Found drivers for a virtual ethernet adapter for OS/2 Warp 4.52 running on MS Virtual PC there. As well the AMD PCNet drivers required for OS/2 Warp 3 on VMware are there.
" And thus am I humbled, for I spoke out of ignorance... " 
--Good on ya for finding + sharing the driver site. OS/2 did have some nice things going for it, native REXX support being one of them.