A shop that has a lot of vintage kits from the 50's and 60's is KB and Friends.
http://www.kbandfriends.com/
They also have some lovely freebies for registered users. It's worth the visit. A lot of the graphics remind me of Dick and Jane. Elements such as viewmasters, silhouttes, fairy tales, garden elves -- a lot of cute and whimsical stuff.
Enjoy!