New injector blades are hard to come by, and when you can find them, they are expensive. I found a source of blades in the form of mini shaper blades by Personna. They come in a dispenser of 20 blades for $7.94 with free shipping on Amazon. That is about $0.40 each. Compared to 7 for $6.99, that is an excellent price point. The donor dispenser does not have a key, so I have to transfer the blades to the recipient dispenser that has a key. Old recipient dispenser with key and key-less Personna donor dispenser. 1. Eject a new blade from the key-less dispenser. 2. You will need to depress the blade or the spring in the recipient dispenser. 3. Very carefully, insert the blade into the recipient dispenser. 4. Continue to guide the blade into the dispenser until it is all the way in. Be careful to keep the edge of the blade from rubbing against the side. Keep the back of the blade to the back. These Personna mini shaper blades are coated and provide a close comfortable shave.