AC- Hacker,It is at this
Dual Pressure Control, 1/4 In Flare Nut - Dual Pressure Controls - HVACR and Appliance Controls - HVACR : Grainger Industrial Supply Link. I put it on the previous page last week. It has to be manualy reset on the high side and is ajustable. The low side is auto reset and has two adustments, cut out and cut in. The price is on the link.
Here is my TXV
Valve, Expansion - Thermostatic Expansion Valves - AC Refrigeration - HVACR : Grainger Industrial Supply
These prices are high. They may be able to be found for less.