I just bought two 1978 Raleigh DL-1. The seat post for the men's bike seems a bit too short. An ideal length might be between 9-10 inches.
I've browsed the web and this site a bit, but did not come across a clear solution.
The seat would be supporting a man under 200 pounds, so it needn't be heavy duty.
While I am at it: is it possible to get a slightly longer handle bar stem??? (I notice a bolt on the top of the handle bar, so it doesn't appear that the handle bar is welded to a stem, but without taking it apart, it's difficult to tell if the stem is separate)