Hi and thanks for responding.
I think the solution lies with the following device, which may have been discontinued. They were running upwards of $500 a pop but I managed to pick up 2 of them, which I have used successfully for a number of other serial terminals.
https://www.raritan.com/products/kvm-serial/accessories/dominion-serial-access-modules
I think it would just be a simple matter of cutting off one end of a USB mini cable and crimping a CAT-5 connector to it, wired in the correct order, but I've had to put this project on the backburner. I also exchanged my XG-7100 for an SG-5100, but both devices have a USB Mini console port (my old FW-7551 had a CAT-5 jack for console so it was a no-brainer with the DSAM).
I will be needing to drop the SG-5100 into place within the next month or so and I will be sure to post my results. Feel free to follow up if you beat me to the punch!