505,
I use Duplicolor bedliner coating, I also try and talk any who wheels their rig to stay away from Powder-coating just for the fact that if you scratch PC all you can do is touch it up the paint or have it stripped and redone. With the Duplicolor if you scratch it all you do is hit it with some sand paper to take off the rough edges and respray that part and it looks like new.
Now if you still would like to go the PC route I can get an updated quote, the last time I checked for just a bumper it was about $60 - $80.
Thanks, Mitchell...