I would say your first stop should be a local motorcycle store that sells used Harley-Davidsons. They probably import them from the USA, and have an established procedure to give them an EU type approval certificate. They should be able to process your bike (for a fee, of course).
There are workshops in Germany, Finland, probably other countries that have the right to issue single-vehicle EU type approvals. It's done relatively frequently around here in the Baltics and in Finland (there is a big Harley/hotrod culture, so lots of demand for imports).
A quick google shows me at least one Estonian vehicle importer that actually advertises a full service for EU type approval for your vehicle. 600€ for a motorcycle, apparently. CARS.EE (use Google Translate).
|