Rear brake calipers

[big_frita]

Hey guys I was browsing through Walmart the other day and came across a guy that races mx and we got talking about bikes. Long story short, I have a 97 kx 125 with a bad rear caliper and i mentioned it to the guy and he said a lot of his friends and himself run universal calipers that are more durable than stock but he didn't know the brand off the top of his head. So if anyone has any clue where i can get a good quality caliper for a reasonable price it would be really helpful. I would resort to oem but they discontinued many parts for my year and model.