For this type of distributor list, I would start with SIC or NAICS codes and specific product category terms rather than one broad distributor keyword. Then layer geography, employee count, branch count, and hiring signals to separate local suppliers from national groups. I would validate a small sample manually first, since industrial businesses often have thin or outdated web data. If you define the exact buyer profile, the list can usually be narrowed to the distributor types most likely to buy.