Hi - anyone know of a source for the rubber weather-stripping that is attached to the door perimeter on the body, and that the window glass seals against.

Mitsubishi dealer parts department (if they're still available new) or a wreckers are pretty much your choices

Yes they are still available new from mitsi. I am getting a spare set for my VRX before they are obsolete. Not cheap tho

define not cheap plz.

From memory they quoted me $200 + per side and that's just for the door frame rubber on the car side as per first post. You then have the rubber seal on the doors as well. All up the quote was over $700
I have it at home somewhere. I am going to get the LH & RH door rubbers that the OP is looking for.

Have you got the part numbers mate? These could be heaps handy to have in the shed.

Mitsubishi dealer parts department (if they're still available new) or a wreckers are pretty much your choices

They are lol. But they're 150+ as side from memory for the runchannel(one that provides a seal for the windows)

Should be plenty at a wreckers. At least there were, last time I was at u-pull-it.
Could be a little bit cheaper than new.