Wheel lug space tool?

Does anyone know of a tool that is made to measure wheel lug space besides a tape measure? I saw a set of plastic made tools that was used at an auto wrecker recycling yard that was used to measure the distance between the wheel lugs for verification when purchasing an old rim from them. On the side of the tool had the size imprinted on it which would read 4x100, 5x5.5, 4x4.5 etc? I've been looking for a set for a long time and haven't got a clue where to look? I asked the recycling yard but no one knows.

Why not just use a tape meassure. It's quite easy (and cheaper) that way

You've got a point there, but only thing is the set I saw was for most cars and you don't have to dilly dally with trying to figure out mm and inches. That's why I am looking for the set. Besides, you get what you pay for. Thanks anyways.