I can make ya a 20 footer or a 50 footer if ya want.
20 feet of 3/8 copper cost me 21 and some change
50 foot of 3/8 i can get for 44 and some change
Add 15 bucks for me to build and whatever shipping cost would be. if ya want fittings would be a little more, but im sure ya can put them on if need be...
I can post a pic of my last 20 footer if ya wanna check it out..