Thank you again for all the advice. If you do a web search for “Wayfarer braket” (note the spelling) you get to Boats.n.bits straight away! Their spelling is a bit whimsical in several places (perhaps Richard Parker is heavily into the maths of quantum mechanics, where bra and ket have precise meaning and are combined to form a braket).
Anyway it arrived very quickly, I was impressed. The next thing is to work out where to fix it – I imagine I will just follow the helpful fixing notes supplied by Boats.n.bits.