Fuel level sensor not working

Hi, my fuel sensor stopped working last week, so i removed the tank and fuel pump during the weekend.
When measuring the sensor I got none resistance, it should be between 250 - 300 Ohm when the tank is empty. So it's probably broken.  
I have tried to find a replacement, I found one from TLM in the Netherlands that cost 250 euro.
Does anyone here know about a replacement or any other way to replace it?
I found this at ebay, Fuel Reserve Sensor Moto Guzzi GRiSO 1100 05-08
It's not loking the same as the original one, but would it be possible to zip tie it at the same place on the rod that the original one fitted to?
Another question, I measured the pin 3 and 4 where the sensor is connected,  I get 12 Volt there, is that correct?

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It’s just a simple thermistor available on eBay for pennies.

See Link

This is just one example, there are lots of cheaper ones as well.

Ok, so I just have to put it at the same height as the original one then?

Yup.