I saw this Facebook petition link posted on PAFOA.org. just "like" the page, and maybe Beretta will take notice and build them.
https://www.facebook.com/BerettaMakeA10mmCx4And92SeriesPetition (https://www.facebook.com/BerettaMakeA10mmCx4And92SeriesPetition)
Someone on the old 10mm talk forum converted a 96 to 10mm.
Converting a 40 S&W to 10mm is kind of silly though, if the magazine doesn't have the space to take full length 10mm ammo. If the ammo has to be loaded shorter, it's not "really" a 10mm, just a .40 that takes more expensive brass.
I would by one, love that design.
I would like to see a 92 in 10mm. I think they would have to beef it up to make it robust enough.