John,
I'm going out on a limb here, but I bought all the hard lines from Inline Tube. I sent them the long fuel/brake lines and they duplicated them.
I should still have them if you need them as patterns. Inline was the only supplier, at that time, that had the correct rear axle and front crossmember
lines. I've read quite a bit about issues with Inline, but my experience was good. I bought Right Stuff and Classic Tube and none of was 100% right for
a Skylark GS. You could make it fit, but looked like it was for another, possibly more common a-body.
Mark