Can anyone tell me where I can get those changeable signs that are designed to attach to the top of cars and/or vans? I am interested in finding out who might supply them ready-made. All I need to do is add the graphics.
I can also fabricate the sign panels but am not sure how to temporarily attach the sign holder to the top of the van without drilling holes. I suppose there are magnets that are available for this purpose. Does anyone know who sells those? Can someone suggest other ideas? Thanks!
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