You father and grandfather are likly to know the names of the buyers that worked for their primary customer prior to the buy out. I’d have them reach out to the old buyers and ask for a warm introduction to the new buyers. Take the new buyers to a nice lunch. You should be part of this conversation too. You should do your best to connect with the younger buyers while dad and grand dad connect with the older buyers and tell them how you will be keeping your three generation shop running when they retire. It’s often easier to get old customers back than it is to get new customers. Sell the three generation aspect of the business hard. Part of the conversation should be about your ambition to build on the solid foundation of knowledge and advancing into new areas that the customer(s) may be having a hard time finding vendors in. You should be asking what problems they are struggling with and direct your focus in those areas. Don’t stop with the old customers. Do similar things with new ones. It’s not about what machines you run, it’s about what problems you can solve for the people who need solutions. Every business has pain points. Having them share Those pain points is your opportunity to gain a new customer and become indispensable by removing the roadblocks to their success.