I'm pretty sure that she had a camo pattern of 507B (medium grey) and 507C (light grey) on the verticals, and the decks were 507A (Dark Grey). Testors MM makes all three.
A wood base isn't too hard. You will have to make it though, too big to use a plaque blank.
I bought about sixteen feet of 1x6 oak from Home Depot about ten years ago and chopped it up into 12, 16 and 24 inch lengths. I took it to a wood shop and had them run a 1/4 round all around each piece. When I need a base I grab one and clean finish it.
You can set her on blocks, or make pedestals, which I prefer. I've got a bag full of these cute little brass cylinder lamp parts. Before I glue the deck on, I drill a pair of holes through the bottom and a pair to match in a base. Then I put a 8-32 through each hole from the inside, spin a nut tight against the hull from the outside, and give it a shot of CA glue. My little cylinder fits over the outside of the nut. Put it on the base and install nuts from the bottom, countersunk.
Here's my Lusty on a temporary base:
And here a ship on the finished base.
I hope that's helpful. It's easier than it looks.
Good luck!