The sizes that Gordon gave you from Z1 are correct.
If you want the genuine info, here you go:
Rear seal 90753-283-000 (34x55x9)
Sprocket plate o/ring 91262-323-000 (92x2)
Final drive flange to hub o/ring 91261-323-000 (79x2.6)
Front seal 91252-300-003 (22x36x8)
Speedo drive to hub o/ring 91302-300-000 (58x2)
That should seal it all up good & tight.