Happy New Year! Well, I guess boom is right - the photo with Maureen wearing the purple toned corset from the title of R, Wormser's novel can be found quite often on the web. It is probably a publicity still - there are also many b/w stills that do not occur exactly in the movie, at least in the uk-version I know.
I got a number of stills (partly from web sites, others bought and others taken from the movie) and I started a photo album in "Arild's yahoo group" - maybe there are other fans of "McLintock" who could add some more; I myself will add some more in the next days or weeks.
Cheers,
fraluchako