I have a friend who has offered to take the cat, but I think that's a bandaid solution to the bigger problem, where fine tuning his training is the real answer. That being said, would it benefit the situation to bring both of them into a confined space where she isn't running and dashing and engaging his prey drive so he can see her up close? Reinforcing the lesson we learned with you, that interest in the cat isn't the problem, its the not coming when called that is the problem.
This morning, he went for her and had her cornered on the counter and when its instances like that, he isn't hearing a word I say, so "NO" is useless. This morning, I responded by shouting t him to leave it, I grabbed him by the scruff and made him sit and then lay down and then only let him up when he calmed down some.
Unfortunately, I was already late for work so then all I could do was put him in the crate and leave for work. I'm worried I may have botched an otherwise teachable moment.