Here's my system:

https://imgoat.com/uploads/2bb90e8976/71957.jpg

It's a kydex trigger guard from Amazon.

https://www.amazon.com/Frame-Amigo-T...2479824&sr=8-3

I attached heavy duty velcro and some strips of sheet metal. https://imgoat.com/uploads/2bb90e8976/71956.jpg

Originally I had the kydex to cover the trigger when using a ClipDraw, but wasn't very happy with the ClipDraw. Then I repurposed it into this.

You can do the same thing with a Boraii holster. https://www.amazon.com/BORAII-Eagle-...frame+k&sr=8-7

I don't have one for my J-frame, but do use a couple for my Bersa Firestorm. Love it.