I was inspired by Ballardian's 234/1 to make one of these for myself. Also, I have several extra turrets - 1x from Rubicon's 250 expansion kit and 3x from Rubicon's 222 armored car kits - so this was a good inspiration for me to use one of them.
Here is my WG/Rubicon SdKfz 234/1 kit-bash. One note though. The Rubicon turret sort of fits, and it works better (full 360 degree rotation) if you do some modifications. I removed the bottom ring protrusion and moved the "L" hooks inward for a much better fit. I also added curved tabs to the front and back to keep the turret centered, and to keep it from shifting about. Alternatively, you can modify the hull to fit the turret, but by modifying the turret, you can still use the original 234/2 turret. This way you can switch turrets giving you the option to have either a 234/1 or a 234/2.