Hi Guys,
someone sent me this link asking if I could reply.
Amphilophus sp. 'Red isletas' is Amphilophus citrinellus from a specific collection location. These have not been imported to the US in nearly a decade. TUIC was the importer of these. Unfortunately exporting out of that country has not been possible for quite a while. Any that are in the hobby being passed around currently are likely from old stock or are just being marketed as so.
Currently (as of 2016) istlanus is grouped as Amphilophus. attached is a short clip of my breeding pair. Currently (as of yesterday) I am out of stock on these but will have them again in the near future.