It is possible to make instrument panel decals if you have a good inkjet printer and are willing to try making inkjet decals.
If you do a google image search and include instrument panel or cockpit in the search terms you can find good panel shots of many aircraft. You need to have a graphics program for resizing the image to the needed scale, but I have made several panel decals that way. I have also searched and found images of various instruments and have done some panels for which there was no good image of the whole panel.