I've designed a stand for the glorious UCS LEGO Venator (75367), which holds the ship at a 45-degree angle to show more of this cruiser.
The stand joints are fully LEGO compatible and fit perfectly for the original stand's designated place—no need for disassembly or modification. You can reuse the original technic pins and the 4x4 elements to lock them in place.
Both stands will be assembled from 2 parts which should be assembled with the pins. If the pins are too tight, rescale them a bit against the X/Y axis.
I've attached a .3mf file with the suggested settings but if you use the .step files, I suggest printing with at least 3 walls and top/bottom layers and using gyroid or cubic infill with 15% at least. Since the rear stand has the greater load 4 layer and walls are advised.
It would be best if you had at least a 254x254mm build plate to print the models in their intended size. Under this size, you should cut the parts, in this case, you will do this at your own risk! You can make cuts easily within your slicer, such as BambuStudio or OrcaSlicer (I think PrusaSlicer also has this feature); you don't need to modify it within CAD.