I am looking to get new truck magnets and am looking for a new provider. Right now I have vistaprint magnets and they look good but the biggest they make them is 12"x18". I want something bigger - maybe 18"x24". Does anyone know a place that makes these custom? Also I have a jpg file for my logo so I need to figure out how to make the resolution expand to that size which right now it can't. Could a print shop do this? I am open to lettering but I figure for resale and changing the logo info over time a magnet is easier. Thoughts?