I'm in SoCal and was in the market to buy FFFFG a while back so feel your pain. Ended up getting the ejection kit mentioned above from buyrocketmotors to do my ground tests, then got a slightly larger quantity from a vendor at LDRS. I was in contact with this place:
https://thereloadingstore.com/ and they were expecting to have some in stock, but not before I needed it. Still have enough from that small purchase (about 2 film canisters worth) and should last me a while longer. Never was crazy about the idea of keeping a lb of BP in my basement anyway...
Oh, and a super generous member of my club sent me a "signal cannon" so my purchase would be legit. Some day I might actually try it out...