R&E Paint Supply used to be a good source to buy paint online and will ship smaller quantities. I did my own fillers at home - the originals finally dry rotted and fell apart. I bought a can of black base coat and a can of 2K urethane clear. I prepped them first, sanding and priming until I got them as smooth as possible. Set up a small spray booth in my garage with visqueen and a small fan blowing outside. They came out great. You need paint experience to get decent results and mine look good. It is time consuming and prep is everything. Just don't paint in cold weather and don't run them, nice even coats every 15 minutes for 3 coats - you can cover anything you missed on the next coat, always keep that in mind.