clothing items, constraints....
You seem to have a lot of constraints to put on members for selecting a holster(s). You may find a good system here; www.kramerleather.com www.glockstore.com www.usgalco.com
. Lenny Magill sells a few items that could conceal a Glock 19 size pistol. 5.11 & a few other brands now have active wear garments too.
I do all my own stunts.