Yeah, prices on RFAs seem to have skyrocketed. SaltCritters used to have much more reasonable prices on them, I think partly because their RFAs are captive-bred? They haven't outright said that, but they sell a lot of little ones, often in mixes of pattern and coloration that don't fall into what seems like the dozenish relatively common patterns. They do still have pretty good prices during big sales, at least, and some interesting green splattery types that pop up now and then.
Some hobbyist or another ought to get on intentionally breeding RFAs (it doesn't seem to be hugely difficult?) and trying to provide them at good prices. I bet a nice big breeding-group bin could churn out a bunch. And, heck- why not start on trying to selectively breed them? If longfin clowns can be a thing, why not long-frill RFAs? No welfare concerns to worry about on an animal with no brain.