My company is looking for a replacement for our old Sioux 1695 Valve Seat Grinder. Due to an accident the grinder is down for repair and parts are very hard if not impossible to find. We are grinding the valve seats of the AVDS 1790 diesel engine. The bore is 5.750", 10.50 deep and the valves are canted to the center axis at 25 degrees. We are looking at several options to replace this aging grinder including flexible shafts. Can anyone offer any solutions or do they know of someone with an old Sioux 1695 grinder laying on a shelf. Thank you, Richard