For the life of me I don't know why I am posting this here, but here goes.
This is a Goodyear, industrial strength flat hose number SF-10 which can be purchased in 50-foot rolls from http://www.apachehb.comat $8/ft. Good luck finding it on their website, but they sell it.
You can call them at 866-810-HOSE (of course). Just go to your local Featherlite/CampingWorld store and get a couple of fittings, cut the hose to length, put on the stainless clamps (of course) and you're ready to, ah, go.
Now I am going to stop writing.