T500 will fit.
[REVIEW] Aurisonics ASG-1 rev 1.2 : A Custom Lookalike (2/11/12 update: Comply and Jaben Foam Tips!) - Page 3
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woah you bumped up my ancient thread. SGS3 tips are the stock tips that comes with Samsung Galaxy S3's stock earpiece. I dont know where to get them anymore, and I have already sold both my SGS3 and ASG-1. Maybe you can find those people who are selling stock smartphone earpieces they dont use. I'm sure there are other tips that can help the fit, probably mentioned in other threads.