Hopefully the hearing aid clinic will also carry a stock of CI HAs as it does regular HAs.
It's a BAHA not a CI processor, but it seems to suffer from the same problem where they're expensive enough to be purchased on a case-by-case basis, which means that if you need one in a hurry, they're scrabbling around for whatever old ones (likely with undocumented minor faults) they have in a drawer.
Fortunately, barakta has two. And only uses one the vast majority of the time (two are occasionally useful for filling in the other side, but mostly it's just more noise).
And she's already got an appointment in a couple of weeks time to be upgraded to the New! Shiny! thinks-it's-even-more-cleverer-than-you latest model, which she will inevitably hate because of some combination of: AGC, inability to give her a sharp response peak at 1kHz, stateful beep-based UI, over-reliance on The Devil's Other Radio, general fiddliness and a lack of physical buttons. (Seriously, the only thing worse than barakta swearing at Microsoft/Adobe products, is barakta with a new hearing aid. She's also not wrong.)