There are 2 information list brokers that come to mind.
https://www.infousa.com/product/business-lists/
https://www.salesgenie.com/

Both of these sites have extensive demographic data to target the information you are seeking.

Remember if you are bulk emailing these people you will be in violation of multiple countries SPAM laws. If you email each one individually and type it manually tailored to each companies CFO it will not violate those laws as you sent each one manually.