The cold might be part of the reason your local suppliers are out of stock. Best to wait for warmer weather. Shipping in cold weather is an issue as trucks and transfer facilities can't guarantee their temps. Even heat packs have plenty of cons.

Otherwise ask around locally everywhere. Someone might know of another that is wanting to get rid of their FBTs. Craigslist, local ads in newspapers or bulletins. Maybe a friend or family member going on a trip by automobile to warmer climates where FBT's might be in stock.