Oh, that looks GREAT! Where did you get this again? I know it's 3D printed, but did you create the STL file yourself?
I'm going for a 1/72 project. I know the turret looks quite a bit like a M42 Walker, but I was having a hard time justifying a $40 kit just to use the turret. So I was kind of humming and hawing over it until I realized I had a Trumpeter M26 Pershing turret in the spares box (left over from a Tintin Moon Tank build project from a few months back). It's not quite as close as a M42, but makes up for it by being already in the spares.
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I was inspired by seeing your project, so I ended up grabbing a Trumpeter T-34 off the shelf, as well as a Trumpeter M4A3 (76) Sherman to complete all three "Haunted Tanks". Technically the last tank the crew drove as an older M4A1 with a 75mm gun, but in the comics, the turret shape is much more like one with a 76mm gun. So I compromised and went with the kit that bears the most similarities. Trying to find a "definitive" depiction of either the Jigsaw or the Sherman was a fruitless search - they both look quite different, sometimes from panel to panel let alone issue to issue.
I'm really enjoying my current DC War Comics kick. I'm also working on an Me262 from the Enemy Ace - War in Heaven series. So I'm paying close attention to what's going on here.