Dive Rite as a company makes the claim that if there is a dive that you think you can't execute with the Transpac (you know, the one with paddings and danglies), contact them and they'd be more than glad to either show you how to do it or come and dive with you and show you how to do it. They didn't specify which type of dive, so I would assume that it includes penetration dive; be it cave or wreck.
Here's a picture from Dive Rite website showing a diver (sorry, not the CEO of Dive Rite) using the DR rebreather, which is carried on a Nomad BC, which is a version of the Transpac.
Here's another picture of the Nomad BC with sidemount doubles. But I'm sure that it's a faked photo because it wasn't taken underwater.
You better tell'em that according to your expertise, they aren't Doing It Right and that they need to go back to school and learn about technical diving skills and that they need Hog harnesses.