I really need the DOF is this case because it's a simple box camera with really loose tolerances for the film plane, plus I don't think the lens would properly cover 8x10 wide open.

The lens looks symmetrical and I managed to take the retaining right out, and take out the two elements on one side (there are two separateable elements on each side). I punched a hole in some black card with a common hole punch and fitted it right in the middle of the lens. Should be about f/36. I haven't tested the camera yet but I may go even smaller, since I don't have a shutter anyway.