Just curious, but why do you need a moonroof wind deflector? My '97 had some wind noise, and by comparison the '14 is whisper quiet.
Speculation here, but Toyota engineers seem to focus on wind tunnel test performance. For example, the optimum placement of optional crossbars on the roof rack, or the famous vortex generators on the side view mirrors and tail lights. Perhaps the automatic moonroof slider switch, which opens the moonroof to around 4 inches from full travel, provides the optimum wind characteristics for an open moonroof?