I have that same small flyer banjoman - its date is 23rd November 1964, with Tony Wilson having to add his name in biro as the printer must've missed him off! Goodness knows how many they'd had done!
If there was a full size poster, I've never seen it.

I have a second cousin with whom I'd lost touch until about 25 years ago at Whitby Festival when my name was mentioned in a singaround and Judith came up to me at the end to announce that her Mum and mine were cousins. As I have so little family, it was quite an emotional moment and we'd no idea that we had this common interest. I see her regularly now and there's only 160 miles between us - funny old world eh?