Jon from mcoupebuyersguide.com pointed out this Z3 Coupe listed for sale on eBay in Calgary, Canada by samslam78. It was originally purchased in Iowa, and still has an Iowa title. The current owner purchased the Coupe from Motorworks BMW in Minneapolis, MN with 81,000 miles; It now has 84,791 miles. It seems like it could be brought back into the US without issue. That is, if somebody wants to pony up and “buy it now” for $19,500 or place the initial bid of $10,500 and hope they get to the reserve. Alpine white is pretty uncommon in general, let alone on Z3 Coupes. While the price is in M Coupe territory, it does have Walnut extended leather, which was never available on an M Coupe.
Thanks again for the tip, Jon!