We do get frost and even snow sometimes. But, I don't even have a hard top yet. You're a few steps ahead of me. I don't want a defroster switch right now. Someday, when I have more money, I will come across a hardtop and the defroster switch. And maybe even factory fog lights and that switch as well(which I've found on eBay).
Like I said, she's all yours.
--Ryan