The springs are a pain. I've even replaced a few with stiffer versions, trying to get a bit more positive action on the bolt stop.. but I've never had a stop itself break. Og well I suppose everything has or will break eventually.. If they have the part Brownells is usually competative in price but they only handle current stuff. They do have parts for the Browning A5.. Still while it isn't being made, it should be,.... In any case good luck, and the best to you and yours...
Jerry
PS--congrats on the buck!!!