freelander temp sender

hello ive got a 1.8 petrol freelander 2003.i think the temp sender is ****ed evey so often the temp guage goes to cold and the fans kick in,the engine runs mint with no over heating issues,even when fans are on ,ive rang my local parts shop and he recons its a dealer part only ???
any help welcome

Part number: MEK100130L

Freelander 1997-2006 Engine Sensors at www.rimmerbros.co.uk

cheers buddy

Bit pricey , I bought the black one from my local motor factors for £9.50