Plastimo log/speedo

My 1987 Plastimo Log/speedo (readout and transducer) as supplied as original equipment to my Fulmar, has just died. Please has anyone got one lying about that they don’t need?

All modern systems seem to have transducer hull fittings which require a different sized hole through the hull and I don’t want to haul out mid season if I can avoid it. Thus I am looking for a temporary solution.

Thanks for your help,

Douglas