Try the Rinker webpage and get contact info from there
Nautic Global Group
4500 Middlebury Street
PO Box 1158
Elkhart, IN 46516
Phone 574.522.8381
Fax 574.522.5120
http://www.rinkerboats.com/index_template07.cfm?series=rinker&mainpage=contact-usgoogle it or try ebay....but trust me, you are better off looking at each piece of equipment,and go on the manufacturer side...the General Rinker handbooks is, well, very general at best.....
ask you folks at the marina, and have them just maintain your boat for you, if you must, just like me, start with a book like : Know your boat (David Kroenke)....that how I got started.