Hi George, welcome to the T-Shirt Forums!
http://www.t-shirtforums.com/showthread.php?t=3770&highlight=plastisol
http://www.t-shirtforums.com/showthread.php?t=4095&highlight=plastisol
Yes, here's a great recent (and informative) topic on Plastisol Transfers:
http://www.t-shirtforums.com/showthread.php?t=3770&highlight=plastisol
Here's a list of a few of the places where you can get them:
http://www.t-shirtforums.com/showthread.php?t=4095&highlight=plastisol