Orbit54028 Plastic Pop-up Sprinkler Head with Brass Nozzle 1/2 Radius, Green

Do you have any full circle sprinkler heads? I have not been able to find full circle replacements. Any ideas?

How much psi does it take to run each head? i'm looking to install a series of these.

What is the spray width of these heads?

How do you adjust the direction of the 1/2 spray’s direction? When I turn the whole head counter-clockwise to adjust the direction, it leaks at base.