Need a replacement for my air flow sensor on my Potterton Lynx Combi boiler?

Need a replacement for my air flow sensor on my Potterton Lynx Combi boiler?

The Air flow sensor on my Potterton Lynx combi boiler has packed in, Potterton do not supply this part anymore, can anyone offer me an alternative to the original air sensor.

Boiler model Potterton Lynx Electronic G C No 47.590.02

Air sensor part No G C No 337215