Imperial tropicals has some nice ones right now
Ime HRPs aren't the best for hybrid projects, most of their genes don't carry over
The whole iridescence thing is polygenic and weird; when crossed to black or grey convicts you get a 50/50 split of sort of iridescent blue fish and normal ones, but when crossed to nicoya peninsula (yellow) convicts you get sort of bluish fish that lack iridescence. There is some blue/cyanophore/iridophore/something gene that is always carried over but gets visually masked by other genes. It can be seen in the platinum phenotype when the leucistic gene is introduced. Ime, whatever this gene is is dominant, hence why you can cross a pink convict and a platinum and get a 50/50 split of pink and platinum fry.
When crossed to other species, the blue mixes with whatever color the other parent was, and again, the iridescence does not carry over (when crossed to nanolutea or cutteri, the resulting offspring are lime green). The only genes that carry over 100% are the red fins and blue beards.