Quote Originally Posted by johnielvis View Post
that looks similar to the 2d 11x14 model and the empire state ones. Those take regular holders.

There's only one way to find out, get a holder and see if she works. If it don't, you're better off modding the back or getting a different back to take regular holders anyways. You donn't want to be looking for ancient holders--they are likely in bad shape if you can find them at all.
Yes, good suggestion. That's what I was thinking.