I'd be more likely to consider them if they had a G19/G23 sized .45ACP
They do... the G30 is about the same size as the G23/19, only a little thicker.
If you reallly want a 45 I'd suggest the G36 though.
Otherwise, for a similarly powerful round that would get you your desired 9+1 I'd suggest the G27... and its even smaller than the G36, by quite a bit.
For $9 you can add a Pearce floorplate to one of the mags if you want a place to put your pinky finger. I dont notice a difference really...