Try rockymountainatvmc.com they have a lot of great tires, usually have some on sale/clearance. You can make sets and get deals too (sets- front and back rubber and rims) or just back/front I think
Buying tires off here probably wouldn't be best idea, with weight and size, shipping would be as much as the tires... Go new
Edit: here's tires from rocky that fit blaster.
ATV Tires & Quad Tires for Mud,Trail, Race, Sand and Dirt | Rocky Mountain ATV/MC