Exeggcute by itself is an annoying foe. I went tree-banging in SS and would drop it to half, but once I'm put to sleep and it's doing a Leech Seed or something, and I can't do anything for five turns, it's fully recovered and I'm saying dirty things. LMAO
I could definitely go Vulpix hunting and seek a Drought ability, but I can't guarantee it. If the ability is only granted upon evolving with the Fire Stone, I could test them out and then proceed to trade you one that can be evolved with said Fire Stone. I personally am not fussy about abilities myself, but if drought is what you want, it can be done. Have you considered that it's the Hidden Ability, however, and not the primary one?
This all assumes I have a Fire Stone. I might have used mine. I'll have to rely on dust spots since I don't have a vibrant Black City.
The time is great, tho not tomorrow, at least not in those hours. I'm going to my uncle's funeral so I'll be unavaiable from 1pm to 8pm my time, and might last even longer. But I'll be online from now (time of posting) for the next 3-4 hourse so you might catch me, also I might be here in like 12h from when this is posted so.... I'll just try to pm/vm you whenever I'm on