I lost the part that connects to the flush button whilst doing some maintenance!, so rather than try to find a replacement I decided to knock one up in cad (fortunately I have 2 of the same type in the house so had another to measure up off) and print it. Elapsed time till it was in my hand? under 1 hour, I love 3D printing. Still in use today, a few years later, with no signs of wear and tear.

I've made mine longer than the original to allow for it to be trimmed to size