Hi Michael,
The regulators are a known weak spot.
If you replace the standard regulator then swap out the rubber mounts for Caterham ones which last much longer:
https://caterhamparts.co.uk/mounts-gaskets/1075-exhaust-mounting-bobbin.htmlOtherwise switch to a Harley regulator which can be bolted directly to the mounting plate without the rubbers:
http://www.talkmorgan.com/ubbthreads.php/ubb/showflat/Number/457187/Searchpage/4/Main/30063/Words/harley/Search/true/Re:_Battery_Voltage_Draning_wh#Post457187