I know how you feel, about 2 months ago I rebuilt my SC. replaced all of the bearings.
go here
http://www.indycgp.com/forum/viewtopic.php?t=12
there are a few links
on the third link remember there is a 2nd page with the correct part #'s
My suggestion is to rebuild it yourself,
buy the bearings, and the seal, take the nose off the SC. take the pully off the nose, and then take it to the Machine shop and tell them to replace the bearings and the seal. it cost me like $30 to have them do it. the whole job cost me like $100, but I replaced the bearings and the seal, and the coupler. remember to buy 2 bottles of SC oil.