Looking for nice leather "official" Stafford collar in London

I live in Toronto, Canada, and I have a friend who will be visiting London in April. I have this silly desire to get a nice leather collar direct from London with the "official" Staffordshire embellishments - Stafford knot, etc. Are there any shops in London that she would be able to find some at? Am I being silly and should just order one online?

Thanks in advance!

don't know about london but there are plenty of collar,lead and harness dealers where i live in wednesbury in the blackcountry where the staffy has its roots. there is even a market stall on a sunday on my football club car park that sell the traditional staffy collars and harnesses. got my girl a gorgeous red one that looks beautiful on her black coat.
so if your friend fancies a drive out of london it's M1,M6 Junction 9 and you are in wednesbury.

AE Collars do some good "Official" Staffordshire collars if that's the kind of thing you want:

http://www.aecollars.co.uk/