Apologies/Buzzers

Sorry about that last post, I meant to contact the poster individually but 
that cursd reply-to got me!  Oh well.  This provides me with the 
opportunity to ask: Since nobody seems to know how to, or knows how to get 
information on how to make your own buzzer system, where might I find a 
(relatively) cheap one for purchase?  Has anyone had extensive experience 
with any particular vendor of buzzers?  Thanks!

RB Severson

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