For compact 1911a1 type pistols, I'd check into the Galco Miami Classic II, the Bianchi Tuxedo/Ranger system, the Aker model, DelFatti, Mitch Rosen.
I prefer angled type holsters like the Aker rig but designs that have spare mags in a horizonal rather than vertical carry mode. It seems like a more practical way to access magazines yet still have space or room for other items(a 2nd belt carry weapon, a cell phone/radio, handcuffs, OC spray, etc).
Galco offers shoulder holster system carry of 4 full pistol magazines, cuffs, etc too,
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ClydeFrog