Anyone know where to find Hydraulic Lift for Truck ramps

[HARRIS Property Management]

After messing around with these worthless springs on the tailgate of my landscape truck, I decided to go with a hydraulic lift instead. Does anyone know where to buy a kit for something like this. Looking for a hydraulic ram with the pump kit to install on the 8'x 6' gate on my landscape truck.

Any help or guidance appreciated.

D. Harris

I attached a pic of the truck to give an idea.