They were used on KTMs for a time. You should be able to source them from a KTM dealer as well - probably for more money - but they might have a pair on the shelf for you.
p.s. if you scroll down in the e-bay listing you will see the listing of mid-90s KTM bikes that this seal also fits. (same marzocchi magnum fork ?).
Years Make Model
1995-1997 Husqvarna WR 360
2001 Husqvarna TC 610
1996-1997 KTM 250 SX
1995-1999 KTM 125 SX
1996-1997 Husqvarna CR 250
1995-1996 Husqvarna TE 410
1998-1999 KTM 200 EXC
1995-1997 KTM 125 EXC
1996-1997 KTM 250 EXC
1995-1997 Husqvarna CR 360
2001 Husqvarna TE 410 E
2001 Husqvarna TE 610
1996-1997 Husqvarna WR 250
2001 Husqvarna SM 610