I have a trunk lid that you could use. I bought it from a guy who tried to pull off the flat-style rear spoiler (still has the holes for the pedestal-type spoiler). They use a lot of that super-strong foam tape and he didn't use wire to separate the tape first. The surface has a slight wrinkle in it at the drop-off edge where he lost the battle of man vs. tape. Since you are doing massive bodywork anyway, you can easily get this fixed too. Otherwise, it's in excellent condition.
I can do $50 plus shipping (which may be $30+). Still better than $200 lids on Ebay.