I'm not sure there are any. Because of the paddle attachment, they stick out farther than a belt holster.
However, Tex Shoemaker & Son holsters,
www.texshoemaker.com does have a simple paddle holster that's the closest fitting that I've seen. The paddle part's just a long flap of leather & it has a leather belt loop that snaps onto your belt. They have thumb-breaks, though & they're not cheap. It is comfortable though, I've carried a Sig 226 & a Glock 21 in them.
I do know that their leather guy's been with them for over 15 yrs. I used to "test" their stuff years ago along with another LE friend of mine.
I bought a Blackhawk mag holder the other day & was looking at their stuff. Their combo holster was interesting. It's a belt holster with a paddle attachment, made out of some form of polymere (Plastic?).
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"Use human means as though divine ones didn't exist, and divine means as though there were no human ones." Baltasar Gracian
Integrated Close Combat
NRA Member
Glock 19, Kahr P45, Kel-Tec P-32, S&W 442, & Dan Wesson 14-2