Can you buy new covers for the headlights or do they sell them only as the complete unit for about 600.00 plus?

I just bought a "cherry" Black roadster with only 39,400 miles. The left headlight cover is good, but the right needs work. I can take it to a detailing shop, but they never get them to look really new.

If I can buy just the covers, great. If not, then I will find a good detailer. Sorry, but after rebuilding 6 different engines on other cars I owned, I don't do this kind of labor anymore at 71.

thanks