I had the same quandary, so I bought a 50ft air hose and put the correct male connector on one end The female at the other end can be whatever style is common to the tools you'll use with the coach. I found Home Depot and Sears have kits with a selection of different style connectors and fittings, as well as a selection of hose grades and lengths; fittings and hose easily store in my small "tool bay" next to the battery bay where my air outlet and bleed valves are.
The male nipples are of different lengths beyond the grip flange, and if too long won't allow the flange to engage the female connector. The flanges are of different shapes as well, and may not grip for a good seal even if the nipple is short enough.
I remember it was aggravating to find there were several connector types out there, they don't all have identifying characters on them, and I went through all of them before the correct one worked. It sure would be nice if original mfrs. had standardized connectors.
Joel