I'm going to assume that's in inches.... If it's in feet/cm/some other measurement, I wouldn't know...
In any case, **broken link removed** makes an "IR hot-mirror" on a 7 mil polycarbonate sheet. The side with the coating is conductive (dunno how much or how uniform). I have one of the sheets, I think it's sold by McMaster Carr, PN: 7769T4.
Alternatively just get a resistive touch panel and disassemble it. I think most of those panes use ITO coatings or something.