I believe AA is the only one manufacturing them. RD is selling the AA flare last post I remember, and so are the rest- Pelican, etc...
Every now and then an original set pops up, few and far between.
The AA flares are pretty darn nice and about every two years somebody puts a group buy together. Last one had the flares at 750$ plus shipping and flared rockers for 150$ (I think).
Heres some reading-
Flares