Two used MCR regulators. $500 each or $750 for both.
Sells new for $4200 & $5800 on Digikey
https://www.digikey.ca/en/products/detail/solahd/63-23-220-8/10071857?s=N4IgTCBcDaIGwGYC0ZljABiQDhAXQF8g
https://www.digikey.ca/en/products/detail/solahd/63-23-230-8/10072092?s=N4IgTCBcDaIGwGYC0ZmoAxIBwgLoF8g
