Best Oxygen Setup?

Ok, looking for the wisdom of the crowd (or even just the individual) here. I want to get an oxygen setup for my glider. It's an old-school touring motor glider (SZD-45 Ogar) but I like to soar it anyway, and I live in SW Colorado so I am regularly bumping my head on the 12,500ft and 14,000ft "limits". (Why "limits"? Well my house is at 9,000' and I regularly ride my mountain bike up to 12,000 ft without getting notably out of breath, but I guess you have to take the rules seriously.) So: what is the best oxygen setup for western soaring, mostly sub-5hr flights, two seat glider, easy access to an oxygen distributor, easy retro-fit to an experimental glider, quite a lot of space in the cockpit? Oh, and budget friendly, in case the glider didn't give you a clue.