I used 1/4" line on my setup and feel like I might have ended up using the Nycoil fittings.
http://www.nycoil.com/Fittings/PushFtg.html
I could see if I can find the receipt when I get home and double check. My setup is probably way more simple than what you'd need for a car. But I just used a Y fitting like this one
http://www.nycoil.com/Fittings/CompYMaleInch.html
then 2 90 degree elbows
http://www.nycoil.com/Fittings/CompM...ElbowInch.html
Then I got a few feet of line and still have a little bit of extra left over. I couldn't tell ya what brand of line I got but I got more than I thought I needed because I don't remember it being super expensive.
I just went into JHF on my lunch with a drawn out sketch of the shit I wanted and about 15 minutes later he just came back with the stuff I wanted. Guy I talked to was really nice and helpful. Could look at the Nycoil site to get an idea of stuff you'd think you'd need and if you had part number and a sketch I'm sure they'd get you taken care of
Threaded Mode