I can't help you with copies but at least these references will help you search for the appropriate manuals for your machine S/No.
Manuals for your 308E2 are as follows. The prices are for new manuals, just to give you an idea:-
SEBU9004 - Operation & Maintenance. All the basics you will need for O&M. $57 in paper form, $49 on CD.
SEBP6877 - Parts. $155 in paper, $110 on CD.
UENR2895 - Service. This is the complete repair manual covering specs, test&adjust, troubleshooting, dissassembly & assembly, etc, etc. New $765 in paper form, $540 as a CD. You might find a used copy in an online marketpalce somewhere.
EDIT: Did you look in the pocket in the back side of the operator seat.? When new there should have been an O&M manual in that pocket secured in place by a steel cable. A lot of people don't even know it's there.