RandyC

I just purchased a set of winter tires and OEM wheels for my 2006 SC430. Where can I purchase a second second set of tire pressure sensors for the tires? Do they have to be purchased from Lexus or can they be purchased from a third party and for how much? Do I need anything in addition to the tires, wheels, and tire pressure sensors? I just purchased the SC430 a couple of months ago and know very little about tire pressure sensors and RFT's in general. Thanks. Randy C