We have been looking for the same lights. Ours work except one of the back up lights does not work. I think we can live with that for now.
There is a guy on Craigslist that is selling his 1989 22' Funchaser. He lives close to 45N and Beltway 8. The email on his ad is
vqtgn-3767858201@sale.craigslist.org. He will respond but give him some time. He was open to selling parts a couple of weeks ago.
My son-in-law appreciates you wanting to get your trailer in better shape when and IF you pass her on. If you get tired of pulling that gigantic 33 footer and want to downsize to a nice 22' Funchaser, let us know.
Hope this helps you Bear.