Thanks for confirming the mag compatibility. Out of curiosity I did try a new 17-round mag out of a CZ 75B in the SAR 2000 and it locked right in. Thanks for the warning about the older 16-round mag. I saw a few other warnings about that 16-rounder in YouTube videos too.
I haven't tried my P10F mags yet because I've
mislaid them in the house somewhere. Oops. They'll turn up.
I've also been looking for tritium night sights on-line, and they're looking elusive. I think I may have to try a cheap set of EAA Witness non-illuminated sights to see if that pattern of dovetail fits before I pop for something more expensive.
I've also been looking for grips, but not a lot of brands mention compatibility with SAR 2000 or SAR P9S. I found a cheap set of Chinese machined plastic grips for EAA Witness, so if that isn't a size match then I'm not out much money. They should arrive next week. If they work, then I will have a slightly larger pool of potential grips. I'd like to find some smooth wood grips with a narrower profile and a bright, contrasty wood, something rich and elegant looking.
After several years without buying new pistols, it's fun to get something new.

Thanks everyone,
Scott