Thanks for these--I have captured the relevant data on a single document, and will be putting that as a PDF on an encrypted thumb drive for the BOB, alongside a scan of their lated vaccination records. I've also updated the information with the vet ( the alphanumerics) and with the shelter from which we adopted the second cat. I'll be contacting the chip companies to double check that they have the right info, including the distance family point of contact. The shelter staff advised me that this would cover everything that I'd need to protect, in case the cats became separated from us in a bug out and end up at a shelter to be scanned.
That seems to be about everything needed. I did also turn up a one-page sheet from another animals-and-disasters forum that can be filled out, with a picture of us with the pet, to have in the kit too as Photo ID for pick-up.
Semper Paratus, Semper Vigilans.