Anyone know where I can get some protectors to put on my aussies front legs. He is limping on one and the vet feels it is either a soft tissue or arthritics and he is not the type to leave in doors as barks continually and gets very fed up. I was thinking of what the agility people use to protect the front knee joint from injury. 

Look at carpo flex - they do various levels of support

Is there nowhere in the UK.

There are several  UK companies that sell pad protectors

A couple of links for you

http://www.forestfleece.co.uk/shop/category_16/Stopper-Pad-Protectors.html?shop_param=cid%3D%26

http://www.countrymun.com/leather-stopper-pad-protectors.html

I got my  carpo flex from a uk site

I got my  carpo flex from a uk site