I went to their webpage to look at all "available". Didn't see anything Desert Ghost related. Usually they will have more of one animal of the genes they sell. However, that could just mean they don't have anymore of them.
What you could do is ask them nicely whether they were ever working with/selling any Desert Ghost. You could even attach the picture. Most breeders don't mind being helpful.
Since you DO want to breed her, it is vital to know just what she is.