debate It is possible to find businesses that haven't a webpage already?

Perhaps use the company register as a starting point, then use google.

most of those business cannot be found on the internet by the way

yes there is a way, but if they don't have a site by now, there may be a reason for that

The Estibot business locator tool lets you search a database of 17 million businesses by name, ex: 'fast cars" will show 11 results for companies registered in the US with "fast cars" in their name.

If you have a short domain like acee.org you can search to see what businesses exist that use that as an acronym (ex: Advanced Commercial Exercise Equipment). There is a video demo of how it works.