There are more then half a dozen fish from North West South America that have been called Blue Acara. The Blue Acara was known by the name Aequidens pulcher. It turns out that the Blue Acaras from Trinidad are the only real A.pulcher and the fish that we know have been moved to different species. There are no exports out of Trinidad, so it is doubtfull that you would find an A.pulcher at your LFS.
I myself have kept A.sp aff pulcher from Venezuela and A.latifrons from Colombia.
The kind from Venezuela is the common aquarium type that you should be able to order from your LFS.