Got it... I replaced a spreader bracket and this guy "Seal's Spars" has all kinds of Balboa parts
http://www.sealsspars.com/
He is old school (a good thing)... after you place an order, he will want to talk to you on the phone... talk you through the installation and make 100% that you have the stuff you need. I have purchased from him twice and can give him a 5-star recommendation.
Call him and you will have your part by the end of the week and your boat fixed before the weekend.
Fair winds,