Bianchi made the Belly Band. as far as i know, it was the first mass produced rig of it's kind on the open market; i first saw one in the 1980s. it is no longer made by Bianchi, but several companies make their own versions of this type of deep concealment setup; i believe Galco has an offering of this style.
the Bianchi is not gun model specific. it accommodates 1 handgun, handcuffs, 2 extra magazines, and money pouch is onboard. it is made of a medium brown colored ballistic nylon material with the closure being assisted by velcro. there is much room for various placement adjustments of the rig. it can carry a G26 under a loose fitting tee shirt without printing.
this is not a rig for fast draw or quick gun acquisition. it is however... a great deep concealment setup that gets the job done when more conventional concealment is not an option.
occasionally i see the Bianchi Bellyband being auctioned up on ebay. is it worth the search? imo it is, should you have the need for this type of offering.