Well, Bandai used to have some really nice looking (and extremely well detailed for the time) armor kits back in the 70s. Those are quite rare now... There are a few companies producing 1/48 armor, but I'm talking about 'garage' companies, and short-run kits. This scale is apparently coming back in France and it is possible that Squadron would carry the kits of those companies (DesKit, Gasoline,...). Those are top of the mark kits, mostly in resin, but they are expensive!
Another company, here in the UK, produces 1/48 aircraft and airfield accessories, including vehicles (tugs, staff cars, tankers,..). Their name is Airfield Accessories, I think (help here guys!). Those are also excellent offerings.
Then there is Hart Models, also in the UK, specialising in British and US world war II armor and softskins. Those can be purchased in kit or fully built and painted. Hart Models' offerings are white metal, not resin.
Hope this helps!