I dunno. I found it in Books in Print a few years back, and got it on interlibrary loan. I think I had better lyrics in mind than the ones they had. I wanted something like:

"We're drinking in the mead-hall,
We're all gonna die!"

Anyway, it's still in print.
Beowulf: a Rock Musical
by Ken Pickering
I.E. Calrk Publications
1986
ISBN 0-88680-248-2
$4.50 trade paperback (yes, four dollars and fifty cents, according to BIP)