Conversion Time on Euro Cars? Can anyone who has carfaxed or owned one help?

Who can tell me how long it took for the conversion on a Euro model to be performed? I am looking at a Carfax on one I am considering and it looks like it was in the country for many months before it was "approved". I would think it would not take this long to convert a car over, but having no other Euro models to compare it to, I am not sure if this is just standard practice or abnormal. If no one has this info about how log their car took to become released after the vehicle arrived in the US, possibly people could PM me some Euro VIN info. I would not ask for any personal information, just the VIN so I could run CARFAX on them and see what the conversion averages out. If you happened to know who did the conversion, that could also be helpful, since it's possible some companies take longer than others. If someone just knows some euro model VIN numbers, not necessarily on cars they own, that would also be helpful, as I am only trying to determine how long the average conversion takes. I give you my word, as worthless as it is on an internet forum, this is not some scam or otherwise disingenuous request for assistance. Thanks in advance for anyone who has the info.