I have seen rolls of Jewish music auctioned on eBay in the past.
There's about a jillion rolls auctions on eBay and if you track them
daily eventually whatever you're looking for will turn up.

I have made what I thought were pretty reasonable buys of rolls on eBay,
averaging out at about 2 to 5 bucks a roll including the shipping, and
I didn't get skunked on any of my purchases.

Tom Lear
San Francisco