My year 2000 regulator/rectifier burnt out not too long ago. None at my usual supplier (RIBs Marine) nor in Belgium, the main European distribution centre. Cookee (on here) came up with American Marine. Hank is the man on 01789 491673.
Apparently lots of these parts are failing and I think they have been re designed. Hank rang the factory in the US and got a spare on a container that day. It was with me six days later. It came with a new wiring loom too. Total cost £358. Though it looked complicated, the loom was easy to fit, as was the rectifier/regulator.
Hank was very helpful indeed and I learned a lot from him. His service was second to none. Give him a call.