Well I have to head to plan B after all.
David Parkinson and his colleague from Fosdyke Yacht Haven finally emptied the sea container containing the smaller moulds of the Parker 325/335 and I think also the 275. Regretfully the mould of the helmsman ‘hump’ seat was not among the moulds. Bruce Parkers was said to be amazed it was not present.
Plan B is to have a company called PolyNautic, based in Woudsend, The Netherlands, were my Surprise is based, to make a replacement seat. They are specialized in one-of-a-kind GRP products. They have seen pictures of the boat with the seat and indicated that it would be no problem to make such a replacement seat.
Luckily this company is close by.
I will bring Surprise to them next Sunday so they can take all necessary measurements.
… to be continued