22 alloys fitted-tpms problem

just had some 22'' alloys fitted, now Ive realised i need to get some tpms valves, LR say they got to be programmed, can I buy aftermarket etc? can I set them up myself

I asked about aftermarket wheels and TPMS sensors, and was told you can either remove your current ones from your oem alloys and swop over, or just buy a new set. No programming required, just driving the vehicle for s short while and the car should re code itself.

Like nickj says, they should be recoded automatically. If not, read my topic here.
http://babyrr.com/forum/Thread-solved-TPMS-confused