I look for used and precise grinding machine for circular blades up to 400 mm

I am looking for an Okta 4000 vacuum pump, model PP W71 000 F. This is the specific model of the pump I am looking for, I am interested in a new pump or one after a general renovation that has been documented.

I look best for used CNC double columns vertical lathe with table 8-10 m, and turning Dia 12-14 m And with milling spindel. Good technical condition.