Try Wemoto.com for the fork bushes and seals. They were good when I rebuilt a set a few years back. They should be able to confirm the sizes too.
Spring-wise I went for single-rate and 7.5w oil, but it depends on how you ride.
HTH.
Paul
Paul
15th year in DD #68 and getting slower by the year
1199, SS800 & 620SSie DD racer