Tuckable holster with retention?

[Aux]

I have seen the posts here listing the popular tuckable IWB holsters, but have yet to find one where a retention device is built in the holster.

Now, I know that in practical terms, things like thumb breaks are a bit redundant on when the weapon is tucked under a shirt, but this is a requirement I am required to follow.

Any recommendations?

[mec]

here's one -sort of. Retention by adjustable tension.
by Aker

[STEVE M]

Fist holsters can be ordered with a thumb-break. I've been

pleased with the holsters I have from them.