Here is a cheaper way to finish that speedwaring cluster that is missing the buzzer. These are manufactured by Niehoff. I check them both out and they function perfectly. They are buzzers that sound very similar to the originals and can mount like the originals on the firewall. All you need to do is wire them up.
$30/each delivered in 48 lower states.
Paypal to
hepperle@msn.com You will need to add $1.30 if paying with a credit card or debit through Paypal. If it is cash or sourced through your checking account, no need for the extra they charge me.