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I have a Houston Holster. It's injection molded. It had a very snug fit on my Bersa 9 UC. In fact, so snug that i took a heat gun to it to loosen it.
It was really quite difficult to draw from before the heat.

The paddle has a 1 3/4 inch wide slot, and a pretty aggressive pair of teeth to keep the paddle in place.
I wear a 2" Blackhawk tactical rescue belt everyday, and the holster works quite well with it.
I also have the heavier Blackhawk tactical gunbelt. It has a stiffener and extra layer sewn on. It makes it nearly three times the thickness as the rescue belt. The paddle doesn't work near as well with it.

I've been goinbg through a weight loss process, and my body shape is changing. It is really showing me that some things that worked in one setup, may not work now. But then may work again in the future.

Have you considered inside the waistband (IWB) or inside the pants (ITP)?
Some of those holsters will hold the gun more snugly than a paddle, and are equally as fast to insert/remove as a paddle. They may have hook style clips or snap loops that go around or under the belt, and do not require belt removal.