Hi all,

I've been searching high and low for such a thing, but can't seem to
find any.

The stuff I'm looking for fits into a small (1-2mm wide) channel
that's moulded into the door frame. It seems to be construced from some
sort of foam covered by a flexible nylon-like sheath, which I presume
makes it waterproof.

The door compresses this against the frame to provide a seal.

I need some to replace the stuff that's got ripped in my front door -
any ideas of a possible source?

Many thanks,
Jon