I've seen them before...check
http://www.ibanezregister.com, find pics of a similar guitar in the gallery and you'll find the model name/number. It might take a bit, but there are worse ways to spend time than forcing yourself to look through a bunch of pics of guitars

It's definitely an old guitar, so look nearer the bottom of the page-ish area. Don't bother checking any of the current model names (RG, S, Artist, AX, etc.).