I collected Deckplans from various sources (many from Traveller), and occasionally use them.
http://delicious.com/hackbarth/deckplans
I used the Dragon class SDB as a Mars-Earth PSV in a con adventure:
http://www.sjgames.com/gurps/traveller/DP6/
For minis I go to the One Monk Forum, where they design Paper Miniatures:
http://onemonk.proboards.com/index.cgi?
Many free and paid models are suited for TS. Unfortunately, none has that 'made for TS' feel. No Felicias, few robots that can be considered TS cybershells, etc. But short of the oficial minis (and there are so few of them), no mini has the right feel (Infinity Miniatures comes close).
I wrote an article about where to get paper minis. It's in portuguese, but you don't have to understand a word to follow the links:
http://www.roleplayer.com.br/site/20...inis-de-papel/