3d printed link 

https://www.thingiverse.com/thing:5237368

“ If you don't have a printer, you could find a piece of urethane (6mm thick iirc), sharpen a brass tube on a rock, and drill yourself a new seat. It is mechanically held together, so it is fairly tolerant if you take care of the top cap (go slow, go around”

Stolen fromhere there’s lotta info

https://www.mcarterbrown.com/forum/paintball-news-aa/the-armory/azodin/227625-the-crusty-kp3-some-interesting-rental-rebuild-notes

The dye lpr reg seat is a perfect match that is better quality than the Kp3 reg seat

I bought a KP3 used. After watching the ANS gear tech vid about the KP3 reg seat issue I decided to take a loom and it doesn't seem to be great. I'd rather swap it but parts are hard to come by in Germany. Can I use any hard rubber disc of the correct diameter? How thick should it be?

It's not leaking, and it shoots, but I have no idea where it'll chrono at. Will fields have spare parts?

KP3 reg seat not looking too good, I guess