How much should I be looking at paying to have my front bumper re-sprayed?

The handbrake came off while parked on the drive this morning (I don't think I applied it fully) and it's rolled into the back of the wife's KA. No damage to hers, just a cracked number plate, but it's cracked all the paint work on my bumper.






I've filled in with some silver touch up to stop it from cracking the paint any further, but it's going to need a full re-spray.