Anybody considered Line-X or Arma in the wheel wells?

Pushing_Tin

Where is a good place to buy it?

SoCal 370Z

Look for an auto body & paint supply store as they have stocked this for years; it's a staple in auto body shops.

Kustom F/X

Any auto parts store should have this or a variation of it. You can also look at paint on bed liner from Herculiner, a quart is more than enough, and costs around $35. You can apply as much or as little as you want, and no chance of over spray. This is what I used on my slammed truck and it works GREAT. Just my .02