Epson only provides negative holders for slides, 120 sized film (large enough to do the whole cut strip as I mentioned), and 35mm. The scanner bed scans up to 8 1/2" x 11 5/8" with film holders removed, and this is where I was mentioning it would be easy enough to cut a mat board to the negative size you need. You just need anything roughly the width of the film holders, which looks about mat width sized...
Originally Posted by darinwc
I haven't specifically tried it yet but I will be soon, and I don't see why it would NOT work. I'll repost after I do.