HMS Cameron/USS Welles

Here's a photo of the Airfix 1/600 Town-class/Wickes-class, which I built more or less "out of the box" as the USS Buchanan (same ship as the Campbeltown):

Not a very good photo, but it should give you an idea of what the kit is like. I built mine OOB as I usually concentrate my scratchbuilding + detailing efforts on larger-scale ships, but it would be easy to improve the kit with scratchbuilt or aftermarket details, rigging etc.
If you're primarily an armour modeller, the Revell 1/240 kit might be the best bet as it's a fairly large scale (by ship modelling standards). However ideally it needs a fair amount of scratchbuilding or aftermarket parts.

The Airfix WW2 destroyer set is extremely good value here in the UK, £10 (about $17) for the 4 ships. The German Narvik-class is an excellent kit (one of Airfix's best 1/600 ships) and the H-class is pretty good, but the Tribal-class (HMS Cossack) is seriously clunky. To be fair, the moulds are about 50 years old - it was Airfix's first warship kit, and probably the first injection-moulded warship kit produced in Europe.

Thank you for the information.  I will check out the possibilities for modeling the HMS Cameron.  Again, Thank you.

Just to make one addition to Ed's excellent list, there's a 1/600 full hull kit by Airfix which with a little TLC could serve as a good starting point for a model. White Ensign offers a number of generic detail sets that can be put to good use.

The only downside is that Airfix in their endless wisdom decided to sell the kit in a WW2 destroyer set, so it effectively comes with a Tribal, an H-class and a Z-28...

Jorit

Mirage has been promising some 4-pipe destroyers (1:400 scale) for about three years now.   They have finaly made it onto their website with a release date of sometime this fall.    Included will be the HMS Campbeltown plus one other Lend-Lease ship (the name escapes me right now).

WSW/DocModell makes a very nice resin 1:700 scale Lend-Lease 4-piper as HMS Burwell.  It takes some time and care to sand the fine guns out of their wafer carriers but the model makes into a nice little ship.  Like all WSW/DocModel ship kits there is no PE included.

White Ensign has a 1:350 scale resin & brass Lend-Lease 4-piper in the works.   It keeps getting pushed back in the queue.   It will be HMS Montgomery.   (I'm waiting for it to make HMS Mansfield -- as in Mansfield, TX -- for which I have photos from the Imperial War Museum.)   White Ensign makes the USS Reuben James -- a 4-piper which has US weapons.

Commanders/Iron Shipwright makes a 1:350 scale resin & brass US 4-piper which can be made into one of 4 configurations.    It could be made into a Lend-lease version with some scratchbuilt RN weapons.  It is sold as the USS Decatur.   ISW also makes a 1:350 scale resin & brass HMS Campbeltown in StNazaire configuration.

Classic Warships made a 1:700 scale resin & brass US 4-piper as the USS Ward.  It too could be made int a Lend Lease ship with some replacement weapons.  I believe that Trident Hobbies has picked up the production rights to that kit.   While on the subject of the Ward,  Gulfstream/Commanders/Classic Warships produced a 1:350 scale resin & brass Ward.  It was the same kit sold under each label. 

Revell made a box-scale (1:240-ish) styrene 4-piper which has been sold as the Ward and Campbeltown.  It did not represent the Campbeltown at StNazaire.   It can be made into a very nice kit with some work (sand the wooden planks from the steel decks) and the application of the Gold Medal Models photoetch set.

Combat Models makes a vacu-formed 4-pipe hull.   It is NOT for the faitn of heart.   You must have a high tolerance of pain, a large supply of Evergreen, a good stock of patience , and excellent scratchbuilding skills to attempt the kit..