You will not find the so called named "Gorillas Umbee" as a WC, only as F1 and below. These Umbee were caught by Chris AKA 'UmbeeKing', at which time he spawned them and produced thousands of off spring. Chris is an avid Umbee collector and he gives all of the Umbee he catches a different sub title. They are all just Umbee, but he gives the names like Gorilas, general, to clarify to him which pair they came from, he does have blue and black Umbee. I myself am selling 2" F2 black Umbee, originating from his original WC pair.
If you want WC Rio Mag Umbee, I can order them for you. They will be 7" and will cost you $150 ea plus $30 shipping(which would be half the actual cost). Gage a friend of mine just informed me that he is bringing in 100 of these from Columbia. If you want them I would need $330 up front before I order them. Decide quickly because they are going fast. I will be ordering from him also.
As for Festae, I can get you a WC male and female not necessarily a pair. They also will run you around $100-$150 ea, they are around the 5-7" mark.
Understand that the 2 fish you are seeking are very expensive when purchased as a WC specie. I just sold a 9" male WC festae this morning for $175 and a 5" female for $70.