your best option is to go to one of the Subaru dealers that gives the discount, I think las time I checked it was about 120.00 with the discount, may have gone up a little since then though. I would bet most bumpers in the correct color will require paint anyway. I am looking at getting a new front and rear cover soon, what color do you need? I was thnking that if enough of us had a particular color we might be able to get a discount.
http://www.mnsubaru.com/forums/showthread.php?t=7915 http://www.mnsubaru.com/forums/showthread.php?t=9361
Mine is wrb also, let me know when you are interested, maybe we can get a doscount set up with a body shop.