I have several 1911's. I like the 1911 Commander AIWB because the hammer area is not squared off like on the Glock. This reduces printing. I have a Tenicor Velo 4 for it. I dislike the molded in wedge for inside the waistband. It works great when carrying the gun behind the belt, but outside the pants. I much prefer my Certum 3. I have it for the 1911 Government, but it's too long. The Commander is the same size as a Glock 17.
There are some caveats with AIWB. PHLster holsters has several really good videos on setting up for appendix carry.
Between the belt and pants is a good option. It prevents hot spots at the cost of a pocket and a little bit of concealment. I recommend this method of carry for comfort and speed of draw. I use the DCC clips because they are very secure and stable (both IWB and Behind the Belt).
There are two holsters, maybe four, that I recommend for AIWB of a 1911 Commander:
1) Tenicor Certum 3 with DCC clips and a wedge.
tenicor.com
2) JM Custom Kydex AIWB Wingclaw 2.5 with DCC clips and 1.5" Pull the Dot loops in Wide configuration. Wingclaw has different heights so you can get it just right.
Check out the deal on AIWB Wing Claw 2.5 Holster for 1911 at JM Custom Kydex
www.jmcustomkydex.com
Optional:
3) JM Custom Kydex George with wedge. Wingclaw molded in. Issue may be not enough torque from the molded wing, but it works great for my Glock 43.
Check out the deal on The ”George” AIWB Holster for 1911 at JM Custom Kydex
www.jmcustomkydex.com
4) Milt Sparks Summer Special with single loop. There is no wing claw, so the butt may print unless you get it just right (see PHLster videos). This is the classic holster from Bruce Nelson, so it likely works just fine.
You can buy a wedge kit from JM Custom Kydex. I use velcro from Home Depot, but I think the wedge kit comes with velcro; I recall it being a bit small. I like more velcro so I can move the wedge up and down.