It seems reasonable to assume that if the company URL cannot be found within the first 4 valid search results, then that company probably does not have URL at all. This is the case for many of the unfound 20 URLs from my test run above.
====Testing Round 2====
Input list contained 150 companies. Scripts Step1 and Step2 identified 75 URLs. 73 of those were correct.
====Actual Run Info====