Wish I had a daughter like you...the grip diameter on the CZ75B and Compact are pretty much the same. The diameter can be tuned, as it were, by the thickness and type of grips installed.
Just to throw something else into your considerations, there is a CZ75 SemiCompact out there lurking in the weeds. It is a parts-bin concoction of the full-size frame and the compact slide. The auction sites (AuctionArms.com/GunBroker.com/GunsAmerica.com) may have one or two listed from time to time.