This is a long shot request, but I don't know many better places to post it.
I am seeking the source code to either or both of Duane Blehm's "ZeroGravity" and "Cairo Shootout" classics. This was available for a $20 fee, before the programmer's untimely death in 1988. So copies may exist... and I'd love to get my filthy paws on one.
I recognize that asking for 20-year-old Pascal sources is a little weird. I am comfortable with that. Thank you for any help you may provide!