Feel free to contact me with some reference and I can let you know about making up some custom sheets for the 'Batmobile' or other unique or local cars.
Here is the thing, I mostly laser print to CLEAR decals. The big issue is I cannot print WHITE ink. So a black car is a problem.
Also the other colors when printed on black are not that fully opaque, so it requires a trick.
I have a WHITE decal paper that I use, but it needs a surround of the background black added as a 'spread' around the art. I use it and it works. Another method is to cut out a slightly smaller white 'choke' shape that goes under the decal art, something for the art to sit on when it is placed on a black car.
Here is a thread from another forum that talks about this stuff, I think page 2 has some pics and an explanation.
http://www.slotcarillustrated.com/porta ... 732&page=2Because of this limitation I have been putting up decals for white (and light color) race cars, since they work perfectly and they work as is - no advanced modeling tricks needed.
The advantage of these hobby-style decals is the custom or unique designs that are possible that may not be available elsewhere.