RE: two questions
If you can get the mexican Coca-cola with cane sugar - it's a treat! Mexican/latin grocery stores often stock it. Try there.
Distribution of premium tequilla's is hit and miss. And the further you get away from our southern border the more miss it is. Hunt in larger cities, look for boutique liqour stores. Look for small estate distillers amidst the major name brands. Tequilla is a liquor where paying a little extra more, yields a lot extra return. A smooth 5 year oak aged Añejo is like a 80 proof kiss of sun.