Repro direct connection trunk lid spoiler- any ideas on mounting without drilling?

I just got my repro spoiler (bought from the usual guy on Ebay) painted up and ready to mount.

I don't have a spare trunk lid and drilling holes in my car is something that I really, really prefer not to do. Can you guys recommend any kind of clips or adhesive mounting system that would hold the spoiler reliably on the trunk lid?

I thought about epoxying in some pieces to serve as mounting points for automotive grade trim adhesive...this seems like it's going to be a big pain in the rear (no pun intended) to get right.

Thanks!!

The pic below is from many moons ago, posted by @74360duster
It looks like this thing is attached without the screws/rivets but I believe it's just held in place with a clamp.