Hi Lee,
There are 2 words you need to know regarding voltage regulators...Delco Remy. Another possibility is Standard Parts Co. Both of those were well-made. Find voltage regulators made in America (means you'll either need to get a new old stock or find a good used one dating back to the early 1980s or prior). These things generally last a long time. Somewhere I kept a Standard Parts Co regulator, but I'd have to look for it. I bought it new around 1978 and it was working fine when I switched to an alternator. New one you buy today will be made either in China...or there may still be some around that were made in Brazil. All are junk in my opinion.