I had the same thing happen in my '74. I found one out at Pacific Corvette for $150, used. The only problem is that this "used" part may last one week OR two years. What I did to "fix" mine was remove it(the bottom where it is heat sealed together came apart), and just made a loop of new fuel line go high up to deck lid heigth, near the antenna base. This "high loop" won't let the fuel go "up", so it does act as a "vapor seperator", the only downside is the original vapor seperator also acted as "check valve" IN CASE OF A ROLLOVER, the gas would'nt comeout should the car remain upside down. I did mine this way over a year ago and it has'nt leaked a drop of gas yet. One thing you have to do is "reduce" it from a 5/16" nipple(outlet of tank,rubber fuel line size) down to 1/4" line size(your steel vapor line size on driver's side of frame). I had like a rubber tube "sheath" that fit over the 1/4" line, then the 5/16" rubber line fit over this. Then tightened with a small worm gear clamp. Remember, should your car "rollover" fuel will continue to come out with this set-up. Until someone reproduces this part and it's kind of a bad design being "plastic", it eventually AGES, comes apart and leaks, I'll leave mine this way. So much for GM Safety-Remember the Ford Pinto
