3D object for GTN750 integration?

Hey there,

I am looking for a working 3D object which I can add via planemaker to add to my aircraft.

I already found some files online but when I add them, I can't see it in planemaker. Is there any way, I can add a panel and see it in planemaker and somehow configure it to work?

I try to add a 3D GTN750 to the pedestal of my V Skylabs DC-3. I already managed to replace the default GNS 530, but I would prefer a GTN panel.

Tanks in advance