Like I said, the downside of those NVRAM parts (not the FeRAMs, those are a different animal) is that all they are is a normal SRAM with that circuitry and a battery encased in epoxy. When you apply power the first time you blow a little fuse that starts the battery discharging, and then in a few years you'll have an epoxy encased doorstop.
For a wirewrap friendly solution that uses a relatively easy to find part look at the datasheet for the
DS1315 Phantom Clock time chip. The main point of this chip is, of course, to be a date/time clock chip that doesn't require any uniquely decoded address space to operate, but it also has built into it the same circuitry that those NVRAM modules have internally to switch between normal power and a battery backup. Pair one of these with a CMOS SRAM chip that's happy running on ~3v when in low-power mode and you have an NVRAM. (The very common AS6C4008 512Kx8 SRAM with TTL-compatible outputs can run on anything from 2.7-5.5v so it should pair with it nicely.) You can use either a single Lithium battery or a pair of AA's to run it, and of course they're replaceable, unlike the epoxy package. (And, again, both the DS1315 and the AS6C4008 are available in through-hole DIP, no surface mount necessary. Only other part you need is a 32khz watch crystal.)
When it comes to availability and pricing the DS1315 tends to be kind of stupidly expensive if you buy it quantity one from places like Digikey, but the 1315 is pin compatible with the older DS1215 and behaves the same. And, well, I know your mileage may vary on used parts from sketchy sources, but a couple years ago I bought a batch of DS1215s from AliExpress for about a buck each and they work fine. The DS1215 is the chip you'd find inside those old "Zero-Slot Clock" modules that fit into a ROM socket on old 8-bit computers, I'm guessing there's a fair chance the chips I bought from AliExpress were literally whittled out of some of those.