Ya, SA parts are more readily available and the SA is a far more popular watch then its little sister,the AS. (go big or go home with that watch style... )
I own a gen SA and have put together or purchased alot of franken SA's,just for fun and interest in them,it is borderline on the cost vs gen with the SA being worth it imo,and the Skyland price difference really just makes it not worth it,no matter what parts you add on to a franken,you still own a rep.
Unless you really love the AS and putting a franken together is for fun or hobby alone,but again i think i have seen one on all of these forums over the years and i'm really not even sure about that.
Not really a popular watch i guess,but would love to see yours if you put one together,a rare rep it would be.