Any one know where the Susato whistles are made?

I bought a low D plastic whistle several years ago. Several finger holes are jagged around the edges and not symetrical, looks like it might have been made on a Monday!
It has been so long I don't think the music store would take it back and I have no recipt, but if the factory was anywhere I could get to, and I were to show them how off the holes are, I would think they would replace it. Perhaps someone knows a phone number where I could get in touch with them, email or snail mail adress.

Thanks
Nick