Trying to rebuild carb

[05Qhuey]

Hey all, new here

My cousin and I have been trying to solve an issue on my gz250 where it is dumping fuel into the airbox adn refuses to stay running for long or at all, he messed with the float and it was stopping the flooding right for a while, but gave back out.

Main problem, I am trying to find a carb rebuild kit for the bike as the one that I purchased ended up being the wrong one and had oversized jets, Mikuni doesn't have a kit that I can find and nothing on Ebay matches the specs that I have found. Is there any kit/catalog that has everything needed to rebuild the carb that I need?

Any help as soon as possible is appreciated

Thanks all