These are a little smaller, not sure how they'ed look, but wouldn't hurt the gear....lol.
http://www.jegs.com/i/Mickey-Thompson/672/3732R/10002/-1?parentProductId=#moreDetails
This is a tubeless bias ply, but probably want to change the fronts too, alot of hassle.
http://www.summitracing.com/parts/MNH-MSS002/