IIRC, there was someone some time ago selling Efke film on TradeMe, but there was some issue and the seller withdrew. I don't recall ever having seen the IR film for sale. The last couple of times I've gotten Efke (120 and sheet) in, I got it from B&H, sharing the costs with a friend.
SFX200 is available (for a price) at WPS. As you probably know, it's not a true IR film.