Quoted from Lermods:Played BBB for the first time at silverball recently, would love to own it. It's a very fun game. IPDB says only 14 units were made, is that right?
The 14 units you are referring to were the original Capcom prototypes. Illinois Pinball later remade 191 units of BBB.
The IPBD listing for the Illinois Pinball remakes:
http://ipdb.org/search.pl?any=big+bang+bar&search=Search+Database&searchtype=quick#5244
The IPBD listing for the Capcom prototypes:
http://ipdb.org/search.pl?any=big+bang+bar&search=Search+Database&searchtype=quick#4001