I think found the correct part.Hi DU75389, You can buy direct from Leak Proof. Or use their part # & search else where. I've only used the classic version, never the low friction. But I've only put them in T140 forks so far. Verify Triumph # to make sure you get correct leak proof.
Leak Proof Fork Seals.
I saw a post from you & it disappeared. Regarding sanding chrome tubes. The chrome is not like highly polished like a head light shell. They are more like fine ground. Sanding can sort of replicate this. Post some very clear detailed photos of tubes after you remove rust. That will give a lot more information.
Leak Proof motorcycle dirt bike and ATV fork seals for Yamaha Honda Suzuki Kawasaki and Harley Davidson have a lifetime guarantee.
What is the shelf life of these items and life once installed?
I have some scotch-brite and an brass bristle brush on the way from Amazon. Once its here I will try Stu's suggestion and yours and maybe do a side-by-side comparison.