OT: Apple 7100/80

Ok, I know this is pretty off topic but could someone tell me a good
place for old (1994) apple parts. I need an ethernet adapter, the kind
that attaches to the comm port in the back and a half hour of google has
yielded nothing.

Thanks,
Bryce C.
Network Administrator
CoBryce Communications
Bryce @ BryceCo . Net

P.S. This is still running MacOS but I do plan on putting linux on when
better support for the old hardware is available.