virtualmuseum.ca now has a large number of pictures of insulators in the image gallery.
Go to the following link then type insulator into the search box:
http://www.museevirtuel-virtualmuseum.ca/Search.do?ig=on&lang=en
Don't be discouraged by the pictures of common insulators returned in the first few pages, there are actually a lot on nice insulators pictured if you keep going (threadless, canadian bostons, withycomes, etc.)
Here are few direct links to some of the better insulators.
Metal covered wood insulator:
http://www.museevirtuel-virtualmuseum.ca/Search.do?ig=on&R=IMAGES_NMST830178&lang=en
High groove withycome:
http://www.museevirtuel-virtualmuseum.ca/Search.do?ig=on&R=IMAGES_NMST721067&lang=en
Pony with an odd shaped dome:
http://www.museevirtuel-virtualmuseum.ca/Search.do?ig=on&R=IMAGES_NMST721106&lang=en
Super milky pony:
http://www.museevirtuel-virtualmuseum.ca/Search.do?ig=on&R=IMAGES_NMST721109&lang=en
Does anyone know if these insulators are on display at the museum?