I'm getting the BFGoodrich g-Force KDW2's 225/45R18 fit on the stock rims. My pirellis are toast.

Tirerack.com has them for 155+ shipping which equals about $650 shipped.

I was quoted around $800 from a local shop to get them and installed (everything):

Is there any other online sources that can get me them cheaper??

 

maybe but prob not tirerack has them pretty damn cheap, but i found that after what places charge to mount and balance your better off going through them also you might should look into 225 40 18 since i think they are 141 a piece but minimal difference.