I know there are some aftermarket turbo options from the states. But what about locally? A quick google shows we have some companies that do turbo rebuilds here. Would any be able/willing to upgrade an N55 turbo, making say a Pure Stage 1/2 equivalent at a reasonable price?  Maybe some N54 owners have done something similar. Anyone know about this? Reason I'm asking is my car is currently getting it's head pulled off at the workshop and I expect it will be in this state for a whil