CB77 Starting sprocket and oil seal

[SMBH]

I still have after so many oil seal changes (not the gen ones) a oil leak from behind the rotor so im after a

NOS Starting sprocket 28110-259-010

Also the oil seal 91201-259-000 32x65x7.5 (the gen one)

I have just got the CB77 back on the road after a full engine sort out and find that I have still got the dreaded oil leak that I have had from when I purchased the bike some 2 years ago.
I am 99.99% sure it is coming from the oil seal I have fitted 32 x 65 x 6.5

THANKS.