Depends on how big the companies you are targeting and the industry. You can either set up an internal process for sourcing leads and qualify them or you can purchase leads from a reliable company. Try http://growthok.com for that.

Make sure you do your research on the leads and find personalized data because CFO is one of those roles that's tough to get a hold of, but there's a lot of strategies behind it to get around and create multiple touchpoints. Get creative and have a solid process.