To be honest, I doubt that you will find a LFS that actually sells pure Xiphophorus maculatus, X. variatus or X. helleri anymore. The odds are pretty good that just about every fish you see labelled as these species has a few genes mixed in from all of them somewhere back along the way, as most have been bred and crossbred for many generations. I'd love to actually get some wild-caught variatus, but I'm not holding my breath; nobody seems to want relatively drab wild-form fish when there are so many colourful hybrid varieties around. It took me a long time to find some wild-form Green Swordtails (X.helleri), but they produce an occasional baby that differs from its siblings showing some oddball colour and markings which make me think I don't have pure-species fish. I'm actually culling those oddballs, trying to restore as much wild-form appearance as possible...or in other words, trying to un-do what generations of careless/irresponsible or even intentional crossing has produced. It's an uphill battle...
The adults you show look mostly X.variatus, but who knows what might show up in the offspring? Even that screenshot from Aquarium Central shows X.variatus-looking fish...but then they are calling them "Hawaiian" platies, so...well, the only possible Hawaiian connection is if the breeder that produced them is in Hawaii, because the original fish certainly are not.