Hi all need some advice, I have a crystal maxi 2 water pump that has packed up I am looking for a replacement I was astonished to see the price of them almost £60, but I have seen other types with the same plug in fitment for far less namely whale pumps these are around £20 cheaper, do I have to replace like for like? or could I get away with a cheaper type? my van is a sterling elite explorer. Thanks in advance.