The Falken Azenis product line has some interesting options and their sizing is close.
http://www.summitracing.com/parts/fal-18314/overview/

Current: 275-40-18
Falken: 275-35-18

Current: 295-45-18
Falken: 295-40-18

These suckers sure aint cheap! A set will run me around $1500! They are 200 treadwear though.