A store called Savers has these pony style tissues in stock. Apparently Hasbro wants to take over your bathroom or something, what with all the toothbrush holders and shampoos that have popped up. I'm OK with this.
No news on if Fluttershy or Rarity are available, these were the only ones that popped up! I guess you will just have to find a new favorite pony for now!
Thanks to Akki14 for the heads up.