Speaking of the Zudah, I think it's often made from Major Duval's machine (machine number 1), the protagonist of the MS IGLOO episode "Phantoms Rushing in Orbit," in which the Zudah is the main character, or the spare Cadillac (machine number 4) that has no camouflage, but I made it from Lieutenant Washiya's machine number 2.
Since it was equipped with a bazooka in the movie, I modified one from an HGUC Zaku to hold it.
I also used flashy weathering to match the atmosphere of the CG model that appeared in MS IGLOO.

The second model of our choice | tsunta's Gunpla works