I found an supremely great deal on MOSFET regulators that are (I believe) identical to the ones Hugh's Handbuilt gets from RMStator
https://www.ebay.com/itm/New-Motorcycles-Universal-Mosfet-Regulator-Rectifier-Can-Handle-Up-To-350-Watts/332536915402
Definitely a easier pill to swallow at $42...