Jamie,
There is no manual and consequently no parts section
You do not mention the equipment with the leaky final drive shaft
Nothing can be mailed to you for two reasons a) There's nothing to mail and b) you fail to give a mail address
Your question is in the DIY Gardening category - Vehicles Tractors or Garden Tools might be a more appropriate place for your next question and be sure to say the make & model.
Good luck...
Peccavi
October 2009