We all share our collective love for the BHP, but there's only so much that the classic BHP design can accommodate.I know it would take some work to get a 45 or 10mm in a HiPower, I just think it would be a lovely gun.
As explained above it would require a look-a-like new design to use the.45 & 10mm, and the increased magazine capacity you want.
Wishful thinking is nice but reality would require a new larger pistol.