are you talking about his frame?
If you click on search up at the top and type in flynn frame, there are several posts about this very topic. MollieSue made her own version of the Flynn frame from pieces that are easy (and cheap) to get at a hardware store. I purchased all the pieces to make one for 15 dollars and some change. Here is her post!
http://www.quiltingboard.com/t-24223-1.htm