I am looking for some surface ground metal parts. Simple shapes but need to be very flat.

I know many smaller surface grinders will not do more than 300-400mm. Ideally I need something about 1200mm long, anyone have a machine for this?

Size wise is 1200 x 150 x 35mm +-. I suspect the Alu should work (it will be used in a epoxy granite type base) to keep a flat reference surface.