I have grown San Andrés in two different seasons. It is just an older Habano type--possibly related to Piloto Cubano--and a rather unimpressive one at that. San Andrés, grown and cured at home, turns out to be simply ho-hum average cigar leaf, with marginally poor productivity.
The unique aroma that we detect in Mexican cigars is not from the variety of the tobacco, but from the manner in which the wrappers (at least) are cured. "Small", open fires are used to heat the curing barns, giving San Andrés wrappers a distinctive, easily recognizable, though still subtle fire-cured aroma. Heaven knows what sort of wood they burn for this.
Another issue with San Andrés seed (Pi 80250, Ti 117) is that, while definitely the same seed that was collected by USDA through its American Consulate in Vera Cruz, back in 1929, from 80 miles southwest of Vera Cruz, San Andrés Tuxtla, Mexico, ["A special variety said to be from the best tobacco grown in the vicinity of San Andres Tuxtla..."], it may have no relationship to the intentionally unidentified cigar leaf that
comes from somewhere around San Andrés, Mexico today. Maybe it's the same variety; maybe not. (Specific varieties are constantly being replace by newer ones, due to disease resistance issues.) Regardless, planting and growing it will not give you what you are looking for.
If you have time to waste, and will sign my "I told you so" waiver, then I will send you some seed for the San Andrés varitey (shaking my head all the way to the post office). I think a better use of your home-growing efforts would be planting, growing and finishing Corojo 99, Piloto Cubano, Criollo 98 and Olor, each of which is genuinely excellent alone or blended.
I believe that chasing the specific aromas of a specific factory cigar is unlikely to end in success. That is especially true of a "recipe" that specifies an unidentified ingredient from a specific geographical region. (Add 1/2 tsp. of American spice.)
Bob
EDIT: One more caveat. ARS-GRIN lists San Andrés leaf as a
filler class, rather than a wrapper type. I agree with this, due to the general shape of the leaf and its vein angle.
Of course, one can usually make wrapper out of anything.