Sorry about your fender-- or should I say Bumper-- bender!
I'm not entirely sure that you'll have any luck with buying a new, already painted bumper. I just recently was doing the same search, only for a chrome bumper and black/dark grey textured fascia. There's a lot of primed ones around.
You might try craigslist. I mean, buyer beware, but I did get quite a few hits there. It just wasn't exactly what I wanted. Look around there some.
Maybe check Amazon. That's where I ordered mine from, maybe someone is trying to sell their color matched bumper. Definitely keep checking your salvage yards, as I'm sure they get new 'merchandise' all the time.
Otherwise, there's always Rock Auto, again Amazon and be sure to check the Registered Vendors here as well.
Good luck and be sure to let us know what happens! :smileup: