Well, FWIW I finally went ahead and changed the rear brakes last week.
These ones:
https://www.stelpet.gr/Proion/16544/...-S602-X-Brake/
were a perfect fit, they did come with springs (despite the pic showing otherwise) and pretty much matched the other compatible offerings for the Eliminator 125, as well as the shoes I ordered from ChinaParts Ltd., UK., just in case.
So at least we can safely say that the Kawasaki Eliminator 125 rear brake shoes DO fit on the ZS200GY-2. Better late than never. The old brake shoes (which had all the looks of being the stock ones) were simply marked "EB" and "130".
That being said, I realized that the brakes never were one of the Zong's strong points. Let's say the rear brake went from "working when it felt like it" to "doing something most of the time", but by itself it remains a comparatively weak rear brake. It's OK for some finesse braking when stopping at a light, and some moderate trail braking, or combined with the front brake. Still, better to know it's there than second-guessing
