Heald model 273A internal grinder

I'm looking for a STUDER #S120 #Internal Grinders, but am open to other manufacturers and models.

I need an internal grinding machine with a processing diameter of 400mm-500mm and a length of 1600 mm -2000mm

CNC Internal Grinder, 2008 or newer

I need a Sielemann RB 160 internal grinding machine, table diameter 700-800mm, grinding length 800-900mm.

Looking for IGM 15 NC in any condition any vintage