Mike suggested I share this on the site. I got this gasketing for my new ride. It should be excellent for sealing up most Cub doors.
http://www.pemko.com/index.cfm?even...ber&partNumber=s773&partCategoryIds=S773D:895
http://www.pemko.com/index.cfm?even...ber&partNumber=s773&partCategoryIds=S773D:895