Hi Chad
Scroll down to Cal Scale in this link, they have a few, i didnt go further then the first page, there may be more by different MRF's too
http://www.walthers.com/exec/search?quick=air+hose&quicksrch_butt.x=0&quicksrch_butt.y=0
190-492 Hoses -- Air & Signal 8 each
Are these plastic? I noticed the brass ones but these dont say?
There is a new company making real rubber ones.
http://www.hitechdetails.com/
I ordered 2 sets of the rubber hoses. They look great online, I hope they are durable?