You can get replacement one piece door seals from Paddocks or Craddocks, they are actually for the 90/110 series vehicles, but the downside is you have to grind off the lip which located the old ones on your door jambs to get them on. The rear door is slightly different, the top piece seal is a seperate item readily availably but price was a bit naughty.
They also sell ‘series door seal’ by the metre but it does not have the metal insert strip which is required to rivet them in place so you will have to resort to glueing them, this particular seal is a bit thicker than the other ones and once fitted required a hefty slam or push to the door to get them to close, so I went with the 90/110 type.