ok i use to have a 450 shock on my blaster then i put a stock blaster shock on but i have 2 front worcs shocks. What would be cheaper getting a back worcs shock or something else.Also it need to be made for a blaster sort of not like a 450.
Then you will be purchasing an aftermarket rear shock.
The reason the 450R and 400EX shock are so popular is because they offer basically the same features (compression and rebound control, threaded spring preload, and they're rebuildable) as the aftermarket shocks but can be had MUCH cheaper. If you want an aftermarket shock for a blaster, you'll be coming up off some money.