Always been happy with Memphis Motor Werks (Leo Goff was my contact).https://www.memphismotorwerks.com/
Vech (Bench Mark Works) sent me there.
They quote upon receipt of your heads .
They turn around in about a week from your acceptance.
They've done BMW and Moto Guzzi heads for me.
Very satisfied with the quality of their work.
Like they say "good, quick, cheap, pick two".
MMW is good and quick (their pricing is commensurate with the service they provide.