Advice is to stay away from cheap MAF replacements. Even if they work properly they reportedly fail within a short period (months at best). The proper Bosch part only comes as the complete unit, and is somewhat more expensive.
This is where I got mine from just recently:
http://www.ebay.co.uk/itm/Land-Rover...item1e7ef2b212
Just having a search, I also just found this from eurocarparts, if that's a Bosch it's a bargain. Does anyone know about these ones?
http://www.ebay.co.uk/itm/MAF-Mass-A...item35cd35fa64