Which Bachmann 2-8-0 do you have?
I have two "spare" (meaning not in use) tender trucks that are either from the Bachmann DCC "On Board" 4-6-0 or the non-DCC 2-8-0 (I believe these locos used the same tender trucks... bought from Bachmann parts, but don't recall which model they were from, since I used both versions in my bash projects), and three complete tenders: 2 from the DCC On-Board 4-6-0s, complete with factory DCC boards (one UP and the other NYC); and one from the "Sound value" 2-8-0 (UP #619), complete with factory Soundtraxx Economi sound board. Altho' I would consider any of the above "available," my first choice would be one of the 4-6-0 tenders.
PM me...
Dave