I have a def tech 37mm (not a DD) for flares, smoke, etc.
This one:   https://goo.gl/images/5qahkf

But this one: https://goo.gl/images/eJL4za
Looks so much more badass (particularly the stock) and functional.
I've looked everywhere for the stock and cannot find it. It is identical to a FAB defense shotgun stock by Mako Group, but obviously they would not fit without serious modifications.
Attempted to email Def Tec today but it won't go through. (IdK why).

Any ideas without heavy modifications?

I have a 1315 DD and wouldn't mind finding that stock, either.

Im not sure.  But I like the regular stock on mine.

I wouldnt mind finding the pistol grip only stock to change out when needed.