They're light enough to carry into your local auto paint shop... get an estimate. They should be able to match up the paint. I can't imagine they would be terribly expensive.
FWIW, I would have offered you $200 plus shipping... because you know... the crappy existing paint job. And because I paid $400 for mine, with the paint tits.
JBauer just stated a Ztop thread. Maybe we should get a Hump thread going.
By the way... if you decide the humps aren't for you (I'd be surprised, they are uber cool) connect with Daniel Andrew. That ****************er will get you $2,000 for the humps. Plus shipping.