Cut-out switch rebuilding

[rivcokid]

Does anyone know of anyone who rebuilds the generator cut-out switch? I had to replace the original one on my mostly original roadster. I'd like to have the original back on (but it was draining batteries dead). I know it involves taking the outer casing off which involves breaking welds, but I don't have the tools or expertise to do that, so in advance, please do recommend simply breaking, cutting, or otherwise un-welding the welds to get into it because I'm not able to do that.

Thanks in advance.