One place to get da music ...
http://www.downhomemusic.com/
Down Home Music is in El Cerrito, CA. It's a great place where, unlike most, you can actually ask someone about a specific genre' of music and, THEY KNOW! Each employee has a particular area, or genre, that they know really well. They are great on the phone, you can order on phone or on line. They have an EXTENSIVE vinyl record collection in the back.
They do not solely sell BB/swing. They sell C&W, World Music, etc. Just not pop, rap, or whatever is currently played on the radio. Great resource ... that is under threat of closure due to hard economic times. If you think that you'd like to purchase music, please consider Down Home Music.