Does anyone know of a site which holds galleries of film certificates (specifically in my case the BBFC Certificates for the Star Wars Films)?

I'm trying to demonstrate what a viewing of Star Wars would be like for me in 1977 to my godson who has gone off Doctor Who (for the time being) and has gone Star Wars crazy.

I have the Rank advert blocks and a trailer for Close Encounters (can't think what the other films advertised would be).

But I would really like the certificate shown before the film started.

If they actual certificate cant be found if someone has a U certificate of that era I could make a mock up.