My Raptor is in the body shop as we speak getting the bumper replaced, so I've done the research, luckily I'm not paying for it. Just the metal bumper costs $1267.63 in Canada. It comes unpainted and there are two colours on it so paint and labour are extra. If you need the two bumper covers (the 2 plastic bumperettes) they cost $84.47. The tow hooks are $119.99 each. The body coloured plastic part (front bumper face bar) between the bumper and the grill costs $1247.20 plus paint and labour.
The aftermarket bumpers, such as the ones available from our sponsors or Hammerhead armour, all seem to cost around the same price as a stock bumper ($1200-1500), but are already painted. Click on any of the links to see your options. Or google ford raptor aftermarket bumper.
You can find guys on here selling their original oem bumper for $200-$300 dollars after they've upgraded to aftermarket.
I don't know whats involved in removing it, but I've been told it's pretty easy.