A search gets 1 hit hmmm
viewtopic.php?t=28615
"The ones I removed are in two halves"...
then
"Anyone know where I can source some? Maybe they were just part of the lower leg ( but as they are pressed in they must be a part number somewhere? Maybe a set from newer forks fit"?
I think you can buy new replacement fork tubes, but doesn't look to me like they have bushings?