I love these hacks! Did you know you can find the source code of this "driver" (foo2hbpl1) on the internet archive?
http://web.archive.org/web/20151008025637/http://www.cyberco...
Which definitely contains 32-bit x86 code.
Still in debian. https://packages.debian.org/buster/printer-driver-foo2zjs
I didn't understand it too.