I recently got one from VW, they are on the shelf at £76 + VAT plus £20 return basis......
Will cost you £79 basically.......+vat after returning the old one...
they generally have them on the shelf.....
Alternatively.....you could get one by post from a user/company on here...
TTS Roadsport
They sent me the following message when I was looknig:
Hi,
We keep replacement mafs in stock. You will need to replace the whole unit as it includes the sensor.
The best price that we can do is £65 delivered, but we would need your old one back as an exchange.
If you came down to us i can fit it for free
Cheers, Alex
Hope that helps mate!