As a challenge to anyone associated with marine electrics, we are looking for a rectifier for an old Merlin Gerin breaker, preferrably here in the UK. The breaker is marked DSA2 08 x 38121, rated 483A, for 3-phase 440VAC. The rectifier is a sealed unit black in colour, one label which reads "110-115VAC", and a nearby label on the frame reads "No.674495". Two black and two green leads on the unit, which also measures approx 90 x 50 x 30mm. Not much to go on, but any leads (sorry about the pun) appreciated.