Retro Tshirts

After carefully scouring the world wide web for the best and funkiest retro-looking tees, here are the two best sources recommended by Retroholic.com:

RetroDuck.com
Their formula is easy and 100% personalized: Choose a design from RetroDucks' design library + Choose your Tshirt style = Your own Retro Tshirt Creation!
All of RetroDuck's vintage t-shirts are made from original iron-on transfers from the 1960's, the 1970's, and the early 1980's. These retro decals are not reproductions, and you will not find vintage t-shirts like these anywhere else.

The other recommendation is an eBay seller specializing in retro-looking T-shirts, check out the Vintage Vantage auctions: