A good place for some info on autogyros is the Britsh Rotorcraft Association website
www.gyroplanes.org
There's a list of gyro instructors on there.
If you are after a factory built machine rather than a homebuilt, the only one available at the moment is the MT-03, from
www.rotorsport.org
There are kits available from
www.layzellgyroplanes.com and
www.gyrocopters.co.uk . The challenge with single seaters is learning how to fly them (!), which isn't helped by the fact that there are only a couple of instructors who will teach single-seat.