I've working on my Polaroid 110B conversion project for more than 4 years
already, and not yet success, but what I can share with you the lens interchange
system I developed, and my silk bellows. I hope to make a 4x5 snap camera, and
if I successfully made it, hope I can provide a "conversion kit" for everyone
who is interested in it also.

http://picasaweb.google.com.tw/salihonba/MyPolaroid110b4x5Project#

by the way, if you look other pictures in my album, you can see I've made a wide
angle 6x9 folder, with very old camera body.

Daniel