I rebuilt mine, but it depends on if the turbine blades are damaged or not, mine was just bearings, you can get garret rebuild kits on ebay, the hardest part is getting the big circlips back in when putting the core back into the impeller housings cus the new o-rings make it really really tricky, you'll need a big vice (ie opens up to at least 6") and some wood, I got my rebuild kit sent from the USA about £28 ish