On 5/16/2016 9:44 AM, Michael Peterson wrote:
I can't find a replacement part because GE doesn't make this model any
longer.

It is probably a WB21X5209. These sell for high prices on the used
market, or for new old stock. They are no longer available from
appliance parts stores.

http://www.ebay.com/itm/like/252385477271

Is there another temperature sensor I can replace it with?

Unlikely.