I have been looking for this very thing in 1/56 and have not yet stumbled upon the single resin kit you mentioned. Who makes it?
This vehicle is far more interesting to me than the ever-present Sd.Kfz 7. Yes, those 88's need to be towed by something, but how often do those show up in games anyway? And when they do, are they usually parked way in the back along a table edge (given their range). Do we need to have their transport handy? It's not likely to be hitched up to the gun to move and reposition the thing, is it?
Whereas the Sd.Kfz 10 towed all sorts of early and mid-war weaponry, and would be far more likely to show up on a tabletop, probably actually towing the weapon itself.
What was the standard tow for the Pak 36 37mm ATG? Yep, The Sd.Kfz 10
Didd it tow the Pak 38 50mm ATG? Yes indeed. And the ammo trailers as well.
How about the 20mm Flak 38 AA? Yes
Nebelwerfer 41? Yepper
Maybe the LeIG 18 75mm Artillery piece.
Not to mention the 10/1, 10/2, 10/3, 10/4 and 10/5 variants.
So yes, three cheers for the Sd.Kfz 10!!!