Thanks for the added info, damienph. Sorry, I wasn't very clear in my post - yes, the 950 Jetfire was available in .25ACP and .22Short. It was produced from 1952~2003. The 21A which remains in production (since 1984) keeps Beretta's palm gun alive after the 950 was discontinued. I'm thinking they didn't see the need to keep two very similar sized .25ACP's and done away with one of them.
I didn't know that the 950 was SA only, thanks!