I have worked out the complete parentage of Vanda Blue Magic from the International Orchid Register. It was an interesting exercise. 5 species make up the genetic mix of this complex hybrid:
-Majority Vanda coerulea, followed by Vanda sanderiana (involved in 10 of the hybrids if I have done it correctly), then Vanda luzonica, Vanda tricolor and Vanda dearei (the last 3 involved in 1 hybrid each).
18 steps in total to reach Vanda Blue Magic (tracing back through seed parent Vanda Gordon Dillon, as species V. coerulea is pollen parent). The starting point (or finishing, as that where I ended up with just species), was Vanda Manila, the primary hybrid of Vanda luzonica and Vanda sanderiana.
I still cannot find anything on Vanda Exotic Purple though...