I'm based in Durban South Africa and spares are non existent here. I used a 46x58x9.5 fork seal. It is 1 mm thicker than than OEM seal. I had to carefully machine off 1mm on the back side, the side that sits against the forkleg. 9.5 to 8.5 The fork tube itself can't be machined to take a thicker (9.5) seal as it makes the area where the fork seal sits too weak. When I measured it all up, there was only 2mm of "meat" there, so machining that would make damaging the fork too risky. Put the original dust covers back and Bob's your uncle!