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.
Clyde