It's a long shot but hoping someone in the arduino community has done it!
I have a PCMCIA card that has some "unique" hardware that can connect to it. Software (lastest version does run on windows 10) still can still support it - confirmed it by installing on PC with card slot - but modern laptops do not have a PCMCIA port anymore.
I was hoping to get a PCMCIA to USB but that seems difficult to find / not reliable... so I'm now exploring the possibility of making one similar to Serial to USB that then emulates a COM port but a bit a lost as to where to start.