Save your money, bore your own tb out to 60mm. You can do this on a mill in about 15 minutes. The stock tb goes from a 60mm bore to a 55mm bore (past the butterfly). Do a search on tech articles for boring your own. I dont think a 62 gives that much more of a performance gain over a 60, and damn, the 60 comes so much easier. If you insist on bolting in and going big, it looks like XJ-armor is selling 62mm tbs on ebay that are painted all nice and pretty for about $150, not a horrible deal.