Just ordred a set of 190/50 120/70 Michelin Pilot Powers from this
www.jakewilson.com. Price: $176.98 shipped! Even cheaper for 180 rears.
Going back now to see if they stock race rubber, but I didn't see any. I did see 2CT's for a few dollars more, but not much.
Use coupon code jw009 for the extra $20 off at checkout