The store locator shows about 48 stores in Abilene that have the Happy Holidays game 1186, many of them being 7-Eleven stores. The game isn't slated to close soon so they should be reasonably stocked but I've often found the store locator to direct me to stores without the games quite often so it's not unusual for it to seem like they've run out, just try the next store on the list.
The game shows as 68% sold but more prizes have been claimed then one would expect, as much as 80% in the $100 prize category. The original odds of winning the top $1,000 prize was an astronomical 1 in 117,644 but now with so many prizes already claimed, the odds of the top prize is now 1 in 134,841. You'd be better off looking for the Celebrate, Double Doubler or Spicy 7's in terms of $1 games.
You may want to think about moving up to the $2 Break The Bank game or the $5 Big Money Bingo or Take 5 games, the expected return is better with the more expensive games although the returns of the $3 games are the same as the returns of the $2 games.
For some strange reason the current returns on most of the $1 games have dropped below the original game return indicating that more higher value prizes have been claimed then would've been expected hence the odds are getting worse in those games.