Every item sent in from USA to EU countries via UPS will be hit for customs duties etc as UPS get a fee for each one checked so it is in there interest to ensure that each packet attracts a charge regardless of its value. I will not deal with any company in USA that insists in using UPS to ship to Ireland as a result.
As previously mentioned by another poster Stein Dinse in Germany have an excellent website and provide a great service for all things Guzzi. Teo Lamers in Holland is also very good and has a great stock but postage rates for small orders are high if you do not negotiate price first.
Best of luck with your Goose and also keep up the great work on your Norton!!