You could make one if need be. the ID needs to fit over the axle and the length needs to fit exactly between the inner bearing races. You should be able to measure the shoulder to shoulder dimension that's inside the hub in which the bearings seat up against to get the proper dimension for length.
Ross
My Rides
1985 250R original (Garage Queen)
-under restoration
1985 250R black and blue full rebuild ( Daily Rider)
-Paul Turner pipe
-+2" Westcoast
1985 Red and White Tecat-EH Sold
1985 Green Tecate Sold
My Wife's Ride
-2003 Suzuki LTZ 400 Showroom fresh and completely stock
My Kids Ride
-2004 Yamaha Blaster, Completely Stock
-2006 Yamaha Blaster, Completely Stock