Know anyone who works in a body shop?
I used to know a chap very well, who was a panel beater (a proper one). He used to have a two pack gun, which mixed the resin and hardener together, so that you just applied the 'goo' to whatever you wanted to bond. They stick car wings, bonnet skins, door skins etc on with this stuff and it will just about stick anything to anything else, provided the surfaces are clean.
Apparently it costs a few bob, so he just used to bring the gun round when needed, and as you will only need a tiny amount it's not worth buying this stuff, not that I could tell you the name of it, as there was no brand name on it.