Take the liberty to ask, do you know where this range/heater lens for Radarlock can be purchased now? I am also a basketball lover and have been wanting to buy goggles, the M Frame Slash is not available, the Radarlock does not have large lenses, which is very annoying.
I've never seen a Radarlock Range lens and a heater was never an option for the Radarlock as it was more of an M Frame thing. To my knowledge the Range was specific to the Radar only. If your looking for a big lens for the Radarlock, your best bet is a Pitch or find a Radarlock XL frame. The Xl extends up more than it does down though.
If you want a Range lens I would just find a decent Radar frame and put a Range lens in it. I O the Radar is superior to the Radarlock anyway.