I know this doesn't exactly answer your question, but perhaps you will find it helpful...
Our 2000 Mounty does not have the SRS side airbags (none of our many Explorers/Mountaineers have had them). Our Mounty's air bag light was always coming on because the resistor caps under the front seats would not make good contact. Wiggling the caps would get the air bag light to turn off for a while, but it always came back on after a few days. BTW - installing the resistor caps and getting them recognized requires you turn the ignition key OFF to reset the airbag light after messing with the resistors.
Some one here suggested spraying WD40 on the end of the wiring and on the resistor cap's contacts. I did this thinking it wouldn't help, but it's been probably 5-6 months since I did this and the air bag light has never returned.
As far as disconnecting the SRS bags, I don't see why getting some resistor caps from the JY and installing them wouldn't work. You should just need the resistor caps as they plug onto the SRS's wiring in place of the side air bags. You shouldn't need to do any wiring mods as long as the resistors are making good contact, but if you do make mods solder the connections instead of using crimp connectors as the crimp connectors may effect the resistance.
I'm surprised that your wife prefers the Limited seats. Most people hate them because they provide little side support, but the earlier Limited seats were a different design from the 2000-2001 seats. I have a set of what I believe are '97 Limited seats in my 1954 F100 and I like those. They're the ones with the inflatable lumber supports.
I wonder if the '97 seats used a different resistor than the later models?