@jeff
Thanks for your answer. I`m familiar with that site although it doesn`t reveal too much... tried to send an email but their contact page won`t work- seems like they`re terribly afraid about customer feedback....
Anyway: Today I`ve got the invoice from the boat dealer who sold the boat to me and on that it´s named "Yachtsman Alu Tender TA 480". That also didn`t turn up anything on Google. It gets more and more mysterious to me since the boat isn`t that old, just 8 years and somebody must`ve sold them back then?!
Maybe somebody else in here knows something. For now I just have to wait...