I love this concerto. The easiest recording to get is "Perantoni Plays Perantoni" on Mark Records. I found it online here:
http://www.earfloss.com/band/8913533.html
This is with the Illinois band--I'm not sure if it's live or not.
Winston Morris recorded it with the Tokyo Kosei Wind Orchestra with Jager conducting in the early 1980's. I thought it would be harder to find, but apparently it's also at earfloss.com:
http://www.earfloss.com/cd/8913336.html
The second one's my favorite, but that could be totally personal. Either recording is representative of the piece.
I don't know anything about Earfloss, so if anyone knows if that's a good/bad company, please chime in.
Richard Perry
U. of Southern Mississippi