You’re talking about the 22 mm version, correct? If yes, then I found one on VaporWorld for $19.99. They’ve only got the SS version-the black is sold out. Here’s a little bit of linky-linky goodness:
If you’re not familiar, I found this using www.vapecrawler.com . It’s a price aggregator that searches sites in the USA, China, Canada and the Netherlands. You can sort by price either high>low or low>high and you can even exclude regions so that you’re not inadvertently ordering from Denmark, China or Canuckistan.
As to a viable alternative, I’ve not used the BFT so I can’t say. That being said, I feel the same about the Billow V2.5. It’s probably going to be the last RTA I buy as I just love the flavor, the looks, the capacity and the ease of use. The deck is a bit smaller than most, but you don’t need massive coils to get awesome flavor from the 2.5. I usually run 26g 316L SS spaced coils in mine and it’s heavenly.