Mmm, they are indeed the parts I now have on order...worth a £15 punt. The actual seals that come off the bike are custom moulded* for Girvin, later manufactured in 'Hostallay' (some funky name they gave to the rubber compound they used)
*flip them over and you can see the witness marks of...
Well...I've spent the last hour or two scouring the net... Transpires this kit: "K2 NOLEEN Pro-Flex RK005" will get me out the pickle I'm in. One UK seller on ebay appears to be selling the same seal in packs of 12 (though I've asked them to confirm the size is 20x13x1.5) - if not, then I'll be...
So...I'm still running around on a 24 year old bike and a few things now need replacing. Got a bunch of M6 hardware on order to replace all the rusty bits on my Girvin Vector forks. However, one of the the 'sculpted seal washer' parts has split. Trying to find new parts is akin to...