Comatrol
Sauer Comatrol PRV12POC-CHB-T-180 Hydraulic Valve Cartridge with Solenoid
You will find that 152226 works well in both hot and cold conditions.
PRV12POC-CEB-R2679 Hydraulic Proportional Valve
A nice touch for the 2N, 8N, 9N 1939-1950 is the built-in belt pulley, which powers old equipment.