Funny as it may sound look up bidet sprayer and hose. The main difference I've found between a bidet sprayer and a regular kitchen sink sprayer is the type of fittings used. The bidet sprayer seems to typically use 1/2" pipe threads typically found in water supply lines and valves. The kitchen sprayer has an odd mixture of compression fittings and fittings special to the mfg of the sink faucet not to mention a stiffer nylon reinforced hose.
Find one with a paddle trigger so that you can hook the sprayer on to things as opposed to just setting it down in the dirt. The hoses are typically a very flexible hose within a flexible outer metal jacket.