Nearly all newer tractors now used standard sized rear hydraulic couplers. I am not familar with any tractor manufacture not using them, but I may be wrong. "Pioneer" is the product which most people are familar with for the standard. Other companies also make the standard couplers - Parker etc.
TSC and other farm stores will have the Pioneer couplers in stock and are a good source. Most commonly the couplers use pipe thread standard but there are also O-ring and other possibilities.
TSC and other farm stores will also be your cheapest source for hoses as well. Many hydraulic stores can make them as well with nearly any length or fittings on the ends but probably at more than double the price. At the farm stores the hoses will typically all be pipe thread on the ends but can be in 1/2", 3/8" or 1/4" diameter. They will often have adapters for the smaller hoses to mate to the 1/2" pioneer couplers. 1/2" hose is ok, but usually larger diameter than needed for the hydraulic flow of CUT.
The pipe thread fitting will need teflon tape or some other sealant to prevent leaking. O-ring and compression fittings don't require any.