Door glass seal replacement

[Bud Krueger <bkrueger@ici.net>]

Hi folks,

      The yet-to-be-named 77B is getting very close being on the road, thank
you.  I see that the rubber seal against the window at the top of the door is
cracked and broken.  It wouldn't do to have rain and snow get down into the
door.  Can anyone lead me toward a good source of DIY information on replacing
these seals?  What else should I consider doing while I perform that operation?
Thanks in advance, or TIA.

Bud Krueger
52TD (what windup windows?)
77MGB x2