Where is the best place to guy the fan switch in the lower radiator?

Where is the best place to buy the fan switch for the lower radiator. The temperature sensor. Thank you in advance

 

I'm not sure what year bike you have but I've found Partzilla to be pretty competitive for price for other parts i've bought. (see link) This thermo switch is pricey at $35 for a gen6. I don't think they fail often. You might test it to see if it is really bad.

 

Bike Bandit still lists the part as available, they are very proud of it though at $46. I am guessing it is gen 1 with a lower radiator.

 

Thanks it is a 1983 yup with lower radiator. I shorted the connection over and the fan kicked on so I would say it is the switch. 46 is better than 62 on partzilla. Thanks for the help.