First Idea, install piforcetools to a tiny pi and add an ethernet USB adaptor to plug into the NetDimm, however use a network itself to control which from a phone, so the Naomi basically is wifi equipped, so one could load the games stored locally or from a wifi enabled laptop/tablet/phone
~second idea
JVS adaptor, simply put, USB in, JVS Out or in reverse.
add bluetooth, could use ps4 or Xbox One controller to run Raspberry pi operating an output on JVS RS-485, any controller would work, even atari if you really wanted to.
It could do both at the same time even, esssentially consolizing a netdimm Naomi. LOL