This is what I want to reproduce:
Wendy Richard (as Miss Brahms) and Mollie Sugden (as Mrs. Slocombe) ©1974 BBC
The men are simple because they just wore regular suits and there are a few of those available.
Also, YAY, IT'S MY HUNDRETH (hundredeth?) POST!!! YAY!!!
UPDATE: I'm going with this. It's too light, but it's the best I'm going to get.
(Photo from http://www.bricklink.com/)