Your dealer will have them, they *may* have a use parts section, you can only ask?
I believe Mark at IM bobcat in utah has a use parts section, not sure if they would have the brake or not though.
Even give “the tool” a yell on here, he swapped over a 743 chain case, he may have the discs from that? if they fit the 643 machines, i have no idea. Its somewhere to start i guess.
