I understand the funhouse effect. From my experience, when plastic breaks, it's usually not a totally clean fault. So you can put the pieces back together and they almost lock, something like a jigsaw. If that's the case, then the geometry should be almost identical. He could test by putting them back together with the tape like he wanted, and testing it out. If the image coalesces into the right spot, then it has a chance. I am bothered by the smallish triangle piece he says broke off though, instead of just one break there's several. His main hope is to look for a replacement in a busted machine, would be much cheaper than trying to have one made. Sucks in any case, good luck with your endeavor. -JC