Most people who would import a gray market vehicle wouldnt take it to a shop (I assume that is where you work but something tells me I am wrong).
I do. I work for Porsche. You would be surprised how many come in or call. We actually have 2 gray market cars in the shop right now. One is in for a Kessy (alarm/central locking control module) and we can't get the U.S. one to code because of the car being a european market car. The tester/coder basically laughs and says f*** you when you try to code it. We went through 3 before Porsche releasing a european one and it took a month to get it. It has been a nightmare.
Other one is in for brakes and an 80k service (oil change, pollen filter, air filter, spark plugs, and serp belt). Luckily all that stuff is interchangeable.
I have a bumper and hood on order for a gray market '08 911. Had to beg Porsche to release those as the headlights are a slightly different shape? Been 3 weeks and they are still a no show.
Could be the brand that I am in? I don't know. You can buy your Porsche and pick it up at one of the factories in Germany. 90% are made for the U.S. but I have a few customers that have houses in Germany, buy/build the cars over there, and end up importing them at some point. Crazy thing is I have only seen one right hand drive one. Out of all the ones that have come in I figured there would be a lot more.