have a quick search on ebay mate. they're pretty cheap..
hydrolic rear brake system for pit dirt bike thumpstar - eBay Other Makes, Bike Parts, Motorcycle Parts, Accessories, Cars, Bikes, Boats. (end time 30-Aug-09 19:04:00 AEST)
hydrolic rear brake system for pit dirt bike thumpstar - eBay Other Makes, Bike Parts, Motorcycle Parts, Accessories, Cars, Bikes, Boats. (end time 30-Aug-09 19:04:00 AEST)