Thank you to everyone sending support and well wishes, here, via PM, and email. There are too many to thank individually, but I really appreciate you all.
Some miscellaneous updates:
My girlfriend is doing somewhat better. The initial symptoms were very similar to a stroke, but bilateral, rather than mostly on one side. She's mostly back to normal mentally, but is still having a lot of difficulty walking, and require a lot of assistance she normally wouldn't, and is having frequent episodes similar to absence seizures.
The chips from Reyax arrived, and I installed a couple, programmed the modules, and now need to let them sit for a few days to verify that they keep their settings even after the backup battery dies.
Reyax has a new model GNSS module available that does concurrent GPS, GLONASS, and BeiDou, but it's 1.8V TTL only (meaning I'm going to have to get creative interfacing with it), its RFI characteristics are a complete unknown, and I don't know if it can be programmed to work around the Uniden GPS firmware bug. I have two on order, and will do some testing once they arrive.
I'm mostly not at home for now, so product orders for battery clips and such are being delayed. I've added a notice to my site so that is made clear to anyone placing an order.
Once again, thank you to everyone.