Robert,
I can't help you (I own a Vivitar 285). but Metz is imported by Bogen. I talked to them a couple years ago when purchasing a Gitzo tripod and they were very helpful on the phone. they can be reached at 201-818-9500. probably tomorrow since it's after 5PM in Jersey. vis-a-vis metz, the bogen website (bogenphoto.com) seems most productive if you click on the metz symbol at the very top of the page. if you go in through "Products" for example, you don't seem to get very far.