Hi Rob and welcome to the forum
There's a quite few of us in the North Wales area with Coupes
If you want someone fairly local for Coupe bits, then at the moment, coupedave lives in Anglesey is breaking one of his, although it's a 20vt, not a 16vt.
Other than that, either check the parts for sale, or breaking Coupes sections for spares or send a message to countrycruising on here