http://www.ibanezrules.com/catalogs/index.htm is a great resource. There's every Ibanez catalog going back to 1981 and the '78 catalog as well. If you can bear looking at some of the awful looks that Stevie Vai has had throughout the decades, its a fun browse and you're bound to find your bass somewhere in the mix.

http://www.ibanezregister.com/history/history-dating.htm shows how to date your bass. The site also has a good search engine function as well.

Good Luck!