As above, presumably you mean the whole door seal rather than the gutter 1.
They come up on eBay sometimes for around 40 pounds.
Ford may be a lot more?
Breakers would be cheaper plus you can inspect it all the way round for rips, you'd be surprised hoe many internet sellers tell you it is mint only to find it has kinks and rips all over the place (second hand).
Mk7 is different to mk6 too.
Apparently new ones fit either side.
Would be cool to buy it in lengths, let has know if you find anywhere that does it

56 350 2.2 130ps mk7 with 2 side doors
65 290 2.2 125ps custom with 2 side doors
07 350 170ps
Ids v86 licence + v86.04 update + xprog
hereIds map
here