Yamaha Outboard Salvage Yard Part # For A 1991 Yamaha 70 Outboard Pressure Control Valve?

Part # for a 1991 yamaha 70 outboard pressure control valve? - yamaha outboard salvage yard

I need a valve for regulating the pressure and the spring of 1991 for 70 Yamaha outboard engines. The chart does not show the game, but it is certainly there. I need all the parts needed to install a new pressure control. Spring, etc. Where do I get?