search anywhere for TrackIR (get the "pro" kits as it includes the wired IR, bought seperately they are $100 more expensive.) That said the unwired one seems to work just as well, but, you need to clip it on a cap, and my strict upbringing makes me nervous wearing a hat indoors , cheapest i could find the combo (inside Aus) was here https://www.megabuy.com.au/naturalp...ker-ultra-pack-inc-trackclip-pro-p532943.html delivered the next day in Sydney. EDIT: Also be aware there are many home made variants with opensource software you can build for under $50.. but, having tried them, they are crap. tracking drifts and reaction time is slow AF, and they also chew CPU cycles a lot more and fewer games support them properly, lots of hoops to jump.. I built this one, but it was garbage.