Accordion bellows repair is best left to an expert who will not only
have the proper materials but also the little metal corners and the
tool to crimp them.  With all the accordions in the world, a repairman
should not be hard to find and if it's his first, he will be very
curious about its mechanism.  That's how I got mine done and he took
care of the mechanics, even though I didn't ask, at no extra charge.
Furnish him a roll, too.

Moe Goldy