I got a cat eliminator project my first mini bike. and i posted here about it and the feed back i got was very helpful. but due to what i was told about the rare and very hard to find rear disc brake caliper . i need help. mine is missing the caliper, mount is still there. is there any way to make a after market caliper work on my bike, and if so what brand and type? ive restored gokarts for many years and ive never seen a brake system like this, where the drive sprocket and brake disc is the same part. not seperate like ive seen . well guys any ideas? thankyou all very much!