Any certified locksmith can cut your Keyport Blades. Here are some resources to help you find a certified locksmith near you to duplicate your Keyport Blades:
Associated Locksmiths of America - findalocksmith.com
Society of Professional Locksmiths - sopl.us
Google - google.com (google locksmith and your zip code) Search for a locksmith with a retail store.
We DO NOT recommend taking your Blades to a big box retailer or hardware store as their key cutting staff often do not have the experience needed to identify and process a wide range of keys.