Lycoming Straight 8 water pump & oil pressure regulator rebuilders?

Looking for recommendations on who to send my Lycoming Straight 8 water pump & oil pressure regulator to for rebuild?Was told it's for a '25-'26 Auburn??  Model H, just like they used on the Locomobile.You'll notice the oil pressure regulator has quite a few hairline cracks being pot metal . If you have a better one or a rebuilt one, I'd consider purchase.
Or, if you have a water pump already rebuilt and ready to go I'd give you mine as a core and cash for the rebuild Tom Griffith    608-999-0366    [email protected]   madison, wisc.    griffithvintagemotorcars.com