Would one of you please provide me with a source for Jumbo (preferably Bicycle) Double-Faced Cards? I have done several searches and come up dry. Thanks in advance for your help!

Bicycle has stopped making their jumbo gaffed cards. Your best bet is to buy their regular jumbo cards and make your own gaffs.

Making your own would be easier because I ran into the same problem trying to find jumbo double-faced cards. Its easy to make.
Good luck...

Since MOST jumbo card effects are meant for platform and stage, spectators USUALLY do not handle the cards. Therefore, double thick cards do not matter. Just use rubber cement, and stick two cards back to back.

Thanks much for your feedback! I'm gonna try the idea of just cementing two jumbos back-to-back, and, if that doesn't work, I did find the thread about making one's own gaffed cards. Cheers!

Try Cards by Martin. He will make just about anything you want. His web site is http://www.cardsbymartin.com