Seeking PET 4016/32 'shift' keycap

After over a decade of keeping eyes peeled, I found a Commodore PET 4016 at a yard sale yesterday (it actually wasn't in the sale, but there was some old phone stuff there, and when I see anything like that I always ask the owner if they happen to have any vintage computer stuff hiding away). The case is pretty battered, and it was disgusting and reeked of rodent urine, but after cleaning it and going over things it (incredibly) actually works. I am, however, missing a right shift keycap. Does anyone happen to have a junker (perhaps one that's already missing keys) and so would be willing to sell me one? It's identical to the left-side, and I think is shared with the 4032 models. Cosmetically the machine's never going to be perfect (at least not without some careful gluing on a couple of cracks and a full repaint), but a complete keyboard would improve things considerably! thanks Jules