Yep: I'll give a hearty +1 on Brady's products and service -- he's a top notch vendor.
Funny you mention him -- I have to get some luggage stuff from him, and was thinking of commissioning him to make a durable sleeping chin strap --- I really hate the flimsy elastic ones: they wear out in about a month and dont' get tight enough to keep my big yap closed, leading to seismic-grade snoring.
I also have done a 12v conversion for my CPAP. I use a small Shorai battery, and have a charging lead on my bike for longer trips. Believe it or not, TSA actually allows it on redeye flights. It's wired with an SAE connector, and charges with a wall-wart sized battery tender. Works beautifully.