Here in the US, a place like hoovers.com would be a good starting point for that sort of thing. There's probably also something like the "Sunglass Manufacturer's Industry Association" which probably maintains such a list. There are also government databases of various sorts, and things like the Chamber of Commerce, etc.
I used the Sunglass manufacturers as an example. Did not mean that literally. I was asking for a more general approach to get lists of related things, exactly like Google sets. Did not know it existed while it did.
Right, I was also just using that as an example. You could substitute the "Sunglass Manufacturer's Industry Association" for the "Mechanical Pencil Industry Association" or the "Nuclear Fuel Rod Manufacturing Association" or whatever. :-)
In either case, the point about Hoovers, various government databases, etc., still stands.
