Funny you should mention it, with some direction from SupaTouring I gave Harrop Engineering a call. If what I've been told is correct, the 1mz-fe supercharger is based on the Eaton M62. They were very helpful and gave me 2 part numbers that would likely to be used (one of them having a 98% probability). The guy on the phone said unless they've done some serious work to the charger, the seal should be the correct one. I should have them up here by Friday, they were only ~$20 each. Biggest cost will be fixing up the seal, in both time and money.