I wouldn't say they are rare but they definitely aren't common! Gorgeous fish, yours look as good as any I've ever seen. Don't get rid of that female! You've got a breeding pair so breed them and spread the fry around. 
Fenestratus Gender Determination?
- Thread starter Nexxus
- Start date
I'd get rid of your other fish before I got rid of that pair! You could just buy a cheap growout tank and separate the fry...
Well this is a great opportunity to learn and advance your hobby.
Seriously, cichlid fry aren't hard to raise, just plenty of food and water changes.