Try orscheln's or tractor supply, They sometimes have this stuff, If you want one that is straight and not a 90
Kansas City Valve and Fitting has them(not stock but they can order them) they are $3.30 or close to that, the part number is b-4-hc-1-2 for 1/4" id hose, 1/8 pipe thread, or b-3-hc-1-2 for 3/16 id hose around $4.00. that is where I get my replacements (on my 1 ton and 1.5 ton)
