[pinhole-discussion] Sheet Film Holders

[Bruce Klemz]

I'm new to pinhole, mainly using a 35mm with a body cap. I've also built one
of the simple cardboard box versions using 4x5 paper negs and love the
results. To get more phototaking (and less walking), I'd like to build one
that uses the 4x5 sheet film holders I read about here. Any advice regarding
where I can find some inexpensive source for them (I'm located in rural
Minnesota and the web is my best access to the real world!). Thanks in
advance, Bruce.