I need a picture of a banner that hangs in Westminster Abbey. The
banner belongs to Sir Robert Ford - one of the Order of the Bath. The
picture I'm trying to get (needs to be a relatively clear, large copy)
is of a black cat sitting down, wearing a golden crown around his
neck, one paw aloft holding a feather pen.

Here is a picture of a
sculpture based on the image (though the cat in the picture is A)
sitting down and, B) wearing the crown around his neck...)
http://www.heraldicsculptor.com/ford.jpg

Here's some information about the Order of the Bath:
http://www.heraldicsculptor.com/bath.html

Here's a place you might start looking?
http://www.briantimms.com/links.htm

Here's another place you might start looking:
http://www.civicheraldry.co.uk/

Best bet would be if you live near Westminster Abbey because I've been
having a really hard time coming up with the picture I'm after.

Again, it needs to be a clear picture of the whole cat.

I hope someone can help!