Are you looking to buy online? Or in a store? Either way im sure if you google it you'll have a fair chance of finding what you are looking for. Try ebay.
Lucky for you ebay just hands accounts out like they're candy. Just sign up and one is yours. I have a mistking, also had the habba mist. I love the mistking, definitely can't go wrong with it!
I cant see why not. I'm pretty sure you're going to want the wood to be treated though, with so much water and all. And as long as there is good enough ventilation and some sort of way to deal with drainage you'll be fine.
I have wooden viv with mesh top. I have small hole at the top to allow the tubing to go through. With mistking you have to anchor the tubing well as it vibrates.