I tried calling the number and ordering the soundtrack on cassette for $8.99:

"Hello, J & R Music World"

Me: "Hi, I'd like to order the Space Jam soundtrack on cassette."

Them: "What?"

Me: "I'd like to order the Space Jam soundtrack on cassette."

Them: "On cassette?"

Me: "Yes, on cassette."

Them: "Uhh...we don't do cassettes anymore!"

I guess I will have to settle for the RealAudio 2.0 previews.