Front end respray to cover chips you could be looking at £200-ish depending on where you go.
If one of the wings (which is really tiny!) has a dent try and get a replacement in the same colour (I can hear Carlt screaming already!
)
For the rear bumper, you're right, it's new bumper or purchase an aftermarket bumper lip if that's the sort of thing you fancy.
Bumper, cost will vary with condition, expect to pay £50 upwards and then factor in respray costs.
All parts should still be available from Carlt our resident coupé breaker, although hurry because he's running away from coupés quickly!