Using the Gigabit port off of an MS431 controller to fix a MS621?

I have an MS621 I was going to use for parts due to a broken Ethernet port but the unit only has 13k pages so nearly every bit of it is in good condition outside of the broken port situation. The prior owner was advised against trying the repair, but given I can handle some component level repairs I'm seriously close to doing it given the condition.

The problem is I don't have a spare MS621 controller board and finding a used one for scrap prices without the paired control panel is proving difficult (you have to replace both together on the MS621, others can be reset with a POR). As I cannot find a used board to do the swap that I need readily on a site like eBay

I have found NEW boards but you will pay an arm and a leg for a new board (plus you will need a new virgin front control panel). All of this with the possibility of losing the programmed data like the PC, SN and other data such as licensing, even potentially being unable to initiate it since you need to load the files with very specific firmware only available to Lexmark internally.

I don't think I can swap the boards directly as the service vs update process is significantly different.

I did look for the 521 board which is basically the same as the 621 board with similar luck. Either way I can't readily find one at a price I will be content with using it for component removal :/... So that brings Plan B onto the mix: find one from a unit released in a similar period or newer, such as the B3340/3442/MS331/MS431 board.

Would it be possible to source a board from a MS331/431or a B3340/3442 and pull the port from that to put on a MS621 board? I checked the specs and both are gigabit Ethernet.

Part numbers:

B/MS (shared): 41X265 (not compatible with the "60k page drum" MS printers like the MS621; if it has the extended port, this will not work)

MS421: 41X1191

MS621: 41X1194