I think this has been mentioned before, but I've just had a pair of GTM bonnet and boot badges made for my K3 by Classic Capsules at
www.classiccapsule.co.ukMy badges were missing apart from part of a broken one and from that Eddie made up new self adhesive ones. I'm very pleased with the result, on £14 the pair including post and packing and a 48 hour turn around.
They can produce just about any badge of that type.
Ian