You know I have searched long and hard for many of the strains mentioned. I have found a hole in the wall web site that sells Panama red seeds. Will I tell the world? Hell no! I'm a bit selfish in that department when it comes to rare strains. But i'll give you a hint, it sounds like seedbay.com! Just type in Panama red. As for mexican sativa, look here -->
PlanetSkunk [ Superior Genetics - Worldwide Delivery ] it's a mix of three types! Best O luck to you!
And on another note: I have Colombian Gold, Panama red, Michoacan, and Oaxacan Red mothers I have kept since 1974. So not all is lost for some of us. To bad I don't have males of these (except Coloumbian Gold-- just a few seeds left), because I would move to Canada and sell seed of these rare strains. I have passed on a few clones over the years to friends and they still try hard to keep mothers of these strains (lol). See also my next generation of bud, I think you'll like -->
https://www.rollitup.org/seed-strain-reviews/2989-numb-nutz-1-x-white.html
Almost forgot to mention--> Over the years I took all the seed from all my rare stuff (Colombian Gold, Panama red, Michoacan, Oaxacan Red, Acapulco Gold, Thai Stick, Maui, Hawaiin, Maui Wowee, and on and on and on (to many to list) and put them in a plastic container which has been sealed for a very long time. Any way I took some out and placed in wet paper towel to seed, out of 20 seeds 1 poped up, just not sure what kind it is or if it's a male. I'm hoping for female (lol). Here soon I'll start a pic gallery of this plant to show the world! I'll keep trying to seed these seeds in an attempt to get a male and female of one of these rare strains, so wish me the best of luck!