Searched but did not find this swap idea, so if it has already been made 30 lashes with a wet noodle for me. Otherwise:
A swap with vintage as the theme. Craft in your particular area of expertise. Your partner picks the era they like, but nothing post 1995. Examples:
20's 30's - Art Deco - Art Nuevo
40's - war era
50's - silver screen
60's - Vietnam, JFK & RFK, Yo-yos, etc.
70's - hippies, Nixon, Woodstock, Desegregation,Hot Pants, etc.
80's - John Lenon Is Shot,Rubik's Cube, Sony Walkman, Reagan, etc.
90's - East and West Germany are re-united, Pre-ripped jeans, Ninja Turtles, etc.
More ideas can be dug up here
The idea could use some refining, but you get the gist? Anyone interested?