Scamp offers a new style door seal that Floyd showed at the Fl Scamp Camp earlier this year. Finally got around to ordering a replacement for my 01 D19 yesterday and will post my thoughts when it arrives and I get it installed.
Got the new seal installed last week before heading to the Outer Banks for several days at the Frisco NPS campground. Most of the three hour drive was in heavy rain and the rat fur on the door showed no sign of moisture on arrival.
It took about a half hour to install with most of that spent removing the old felt style gasket. The door now requires very firm pressure to close especially from the inside but we're well satisfied with the results so far.
The gasket from Scamp is very similar, if not identical, to the one posted above by Ian.