Weird hydraulic brake caliper mounting size.

[Nickdsatx]

Hi All. Super newbie here. My son and are are building a go kart. The frame was an old frame but solid. Cater Talon
We are getting close to being done and are working on the brakes. We have installed a hydraulic master cylinder and pedal etc. but we are really struggling to find a caliper that fits the mounting bracket already on the go kart. The holes are 2 1/4 or 57.15Mm. And we can’t find one caliper that fits it. Would love some thoughts. Maybe we need to get a new mounting bracket but I’m worried about how it mounts to the Axel area.

 

[Master Hack]

Well super newbie, you have stumped our panel of experts!
Looks like your next best option is fabbing up yer own or finding a fabber to fab one up fer ya!
Good luck on yer quest! For future reference, our panel of experts responds better to easy queries. Difficult questions often go unanswered.