There are a few for sale in the latest Popular Flying mag. Before buying, be sure to get a good inspector to check for intergranular corrosion in the wing spar (especially the left one for some reason). It's very hard to spot so if you can find an engineer who's seen it before so much the better.
Check out PF magazine for the address of the Luscombe owners club. I'm sure they can point you in the right direction.
It was only the E model that was all tin, the previous models had a fabric wing and need to live inside.
I knew a guy who had a 150hp Lycoming in his. It climbed like a homesick angel and could cruise a few knots short of the VNE!
If you are thinking of an aeroplane like this, membership of the PFA is a must.