Haven't seen any for awhile, I assume they've dried up. Any ideas on prices/availability?

sarco was the last to have them, and did until a week or two ago but i think they are sold out.

IMA (International Military Antiques) may have some, but they aren't listed on the website. I'd recommend calling them and asking but be prepared to pay for it. IMA isn't known for being the cheapest game in town.

Otherwise, check on gun broker.  If you're looking for a complete gun, try project guns, he seems to have built guns normally.