AlanRatcliffe
IIRC, either Tuerk (Turnkey) or MIDI Cape (TOMS) imported both plastic and metal ones. But any store should have/be able to order for you.
As for metal kazoo - have you Seen the Bumblefoot live at the RMA vid? Ron plays the solo with one hand and scats the notes with a kazoo at the same time.
Not the clip I mentioned, but on the same topic (NSFW for some swears):
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