eBay or Amazon. Get one of the Chinese. Get one literally 75% cheaper. I've got a Chinese one on my Yamaha and it works great.
You're one of the only ones that have had good luck. I've had multiple people come in with the knock off Chinese carbs at my and they're bike wouldn't run good at all. Take the original carb and build it and its fine. The ones I've dealt with also don't use the same internals so if you ever need to rebuild it the parts won't work. I use some of the cheap China parts but carbs aren't one of them. I tell everyone they're junk and you're much better finding a used carb that can be build if what you have is messed up.