Some period photos
The pic below is on Longdon in 1983, the year after the war
The exact weapon, Argentina's Model 1968 RCL, isn't available so I picked up a Sgt's Mess 105mm RCL and an Under Fire Miniatures Wombat to cut up and convert.
The bits I'm working with
I ended up using the Sgt's Mess 105mm barrel and the wheeled carriage from the wombat, I had to add slightly larger wheels and increase the width of the carriage.
For the barrel I added a Venturi and thickened the barrel up at the rear with a bit miliput, a small piece of plastruct was added to the muzzle as well.
I've also started work on a 4 man crew using Liberation Miniatures, I wanted a guy holding a shell so small conversion after getting the shell dimensions is underway.
Next up will be the ammunition, shells, packing tubes and cases.