PDB said:

This could be an amazing resource, beside the Star Wars films they have 16mm copies of (including what others have mentioned):

Indy films

Close Encounters

Ghostbusters

2001

Star Trek 2

ET

Independence Day (eh)

War games

Edward Scissorhands

Shrek

Fantastic Voyage

Explorers

Short Circuit

Forbidden planet

Planet of the apes

Princess Bride

Dracula

North By Northwest

The Birds

39 Steps

And that's just from a few minutes of searching

A lot of those are available on 35mm for either loan or rent. If there is any real interest (i.e. people willing to cover the cost of rental and freight etc.) most of those could be sourced from 35mm instead of 16mm.