Some possibly helpful info:
Paintscratch.com aerosol cans are about $30-$35 per. If you order $100 bucks worth of stuff, they drop the shipping. Ended up with 4 or the cans for $100. Their other supplies are way overpriced, you'd be better off picking them up at bLowes, Home Despot, any of the auto stores, or autobody specialty stores.