[ClydeFrog]

There are a # of carry methods you can try out. Some are better than others. One carry method I'd advise against is the small-of-back(SOB) or middle back carry.
R&Ds and sworn LE feedback shows that SOB carry could cause a serious injury to your spine or lower back if you were pushed down/wounded.

In the late 1990s, I packed a Beretta 96D .40 with a ported/extended barrel in a black leather Aker Comfort Flex shoulder rig. It worked great even up to 16hrs.
A IWB style rig or inside-the-waist may be good for your build. Ted Blocker's LFI series(co-designed by noted gun writer/sworn LE officer: Massad Ayoob).
The Galco Miami Classic II shoulder holster has merit. I like the angle style pistol carry & the horizontal magazine carry. It frees up area in the belt area on the off-side.
Kydex & synthetic material holsters may fit your needs.
Good brands include Safariland(SFS & ALS), High Noon Holsters(Skin Tite), COM Holsters, Blade-Tech, Blackhawk SERPA.
Custom or exotic holsters may take longer to get but many armed professionals(spec ops, LE, PIs, EP agents, etc) like them. Shark, Rhino, Horsehide, Bull, etc.
Always call first before you order or buy. Some design changes or minor features may not fit a holster with some pistol models.
Here are a few good holster brands to review: Greg Kramer, Milt Sparks, Galco, Alessi, Kirkpatrick Leather, Don Hume, Lawman LeatherGoods, Ken Null, El Paso Saddlery, Mernickle, Mitch Rosen, DeSantis.
Always carry at least one fully loaded spare magazine too. I prefer to use FMJs or ball type rounds; 124gr 9mmNATO. Ammunition like Buffalo Bore 124gr +P+ FMC, Corbon PowRball, Ranger T 124gr 9mmNATO.

CF