Which AR style grips have a bottom cover plate with thread?

[bigHUN]

On my Impact MK2 I have several vertical grips for my BR shooting (Penguin, Emperor, from AO, Ergo Zero) but none have a cover plate with a threaded hole from bottom.

I never thought about it before but now I would have a good use for this thread beneath the grip. Working on an adjustable rear stock and would like to connect with a grip and use this as sort of "rear rider"... not a bag rider (I don't use bags)

I can fabricate (3d print) something for myself but these grips are not designed to have a bottom closed.

Anybody have a working sample?

 

[Bobbybeef]

fab defense has a cover and you can also get it with an adjustable cheek riser

 

[bigHUN]

Uhm, my bad, forgot to define for vertical grip with a cover plate...

Are these Izrael made?

 

[bigHUN]

Simple research turns into nightmare

What I prefer is harder to find then I thought - AR style, vertical grip, skeleton and possibly to have a hole on the bottom, and to have the upper shelf for resting my thumb finger and eventually to have the lower shelf to rest my pinkie. And shipped to Canada is a major $$$$t