http://www.toyo.com/tires/tire_specsheet.cfm?id=2
See if this link works. This is a tire data sheet on Toyo's website. Whether you're going to buy Toyos or not, at least this will give you heights for a variety of tires.
Measure your stock tire height and then look at the chart to see what 17" tire has the same height. Make sure to stay with about the same width or a little wider (about 20mm wider is probably the max)