I have a white car that I'd like to make a black car. Is it crazy expensive to buy OEM panels from Smart? I checked around eBay and it was slim pickins. What's next up? Craigslist? Facebook? Maybe a "want to buy in LA" on this forum?
buying panels can be expensive depending on where they are and how far you want to go to get them. I believe prices from the dealer run from $800-$1500 depending on the color. Black is a molded in color (MIC) so painting won't be needed. They are still painted with a clear coat.
The panels for sale section is in the marketplace/smart parts marketplace https://www.smartcarofamerica.com/forums/f11/body-panels-sale-wanted-swap-thread-5091/
and is worth a try. some of the postings are quite old and you might not get a reply if the member is no longer active.