Anybody advise where I can get a replacement housing,as my spare has been chewed. Works fine,but is very chewed up!

Only need the housing - dealers want an arm and a leg for a plastic case!

ebay s the place :eBay item number:

eBay Item No. 390537941135 or eBay item number:

eBay Item No. 390744873995

Thanks - looks like you have to cut the case open to change the electronics!

There are threads on here about changing the battery which will explain everything you need to do. Try a search. Incidentally, the ones on e-bay are ONLY useful for the casing and possibly battery - they cannot be recoded to your car.
Edit: Like this one: http://www.freel2.com/forum/topic8404.html?highlight=fob+battery