There are - they are called "registered importers" (RIs) and here they are;
http://www.nhtsa.dot.gov/cars/rules/import/RiHT0012.html
Be prepared to spend no less than 3 times the cost of the car to get it done, plus a year of time. Plus you need approval from the government for them to say that it would even be possible. (it isn't)
Your registered importer must be able to petition the US government that the modifications are possible to bring the car into compliance (because you as an individual cannot do so). A RI will want money up-front to even look at a potential vehicle that has not previously been imported, if they are willing to look at all (which they are not)
You need to be importing an entire brand of cars to make this cost effective - or import $400,000 vehicles.
Or, do what people used to do with Austin Minis (not that I ever did such a thing) Have the vehicle you want completely dismantled in the country of origin, and send piece by piece via UPS.