i have seeds of blue dream x mexican. the mexi came direct from mexico by a family who grew "original mex". the first generation indoor became immediately root bound and hermied to pollinate the blue dream.
Chimera had his Mexican highland x Blueberry some months ago...that was the last of it I've seen. Pisces Has some Colombian crosses RIGHT NOW if you want something kinda close.
I grew a pure sativa, landrace Mexican strain from some schwag weed it was awesome. A 15 footer outdoors but the weather in my latitude didn't allow for full maturity. If you have access and are willing to deal with what might seem slightly shady characters i think you should get yourself a zip of mexican ditchweed, that brown brick crap a zip should have 50 or more seeds you might be surprised with the results given the proper conditions.
the mexzita is also something to look into , it's a nep jam crossed with oaxican male . this ones fem .the oaxican may be what you are looking for it is supposed to be relatively firm in its sex . The same is going to relese miochan red , and oaxican x oaxican 13 finger, but not soon
The phenos are incredibly homogenous too. Go 4 it, however B prepared for 6 to 9 ft. Christmas trees INDOORS. Very unruly, but an incredible almost speedy head. Thoughts and words a million per minute. Best of luck
Mextiza is a forever flower. as are many of these landrace sat. Just be prepared to hack the beast in half after 3 months because they are 12+ feet tall in you basement. I am glad @Mr.X had good experience. Often I am disappointed.