Is there any company directory that can provide direct contact information of decision-makers?

This is just me thinking out loud on how I would work around this. I would look up the company I am about to call. Find out the CEO or President, the higher up person. Write down their name & any info you can find. Go through their companies website or phonebook information. Find a phone number that calls the highest you can get. Skip customer service or front desk numbers. When you get someone on the phone, ask for the high up name you have & that you were told to call him. Which is true, you were told to call him (by your company). They will just think that their company is wanting to talk to you. This method should get you somewhere.