Here two of the prime movers in the field though there are more. You are looking at an intensifier which is driven by hydraulic fluids instead of pump.
I wouldn't recommend cobbling a system together, instead I would look at the whole package.
FYI: Intensification is when you take, say 2000psi (of liquid), and run it into a ram which is pushing on another smaller piston. The pressure of the fluid behind the smaller piston will have been 'intensified' by the ratio of their piston areas.
Last week I was shocked to see this occur when pressure was run into a double acting cylinder the pressure on the other side of the ram was far higher than the pressure supplied by the hydraulic pumps. Really confused me for a minute.