If you are looking for original and correct for your car, I have a complete setup for sale, I did have the air cleaner setup but I sold it already.
The aircleaner can be bought for around $320 from a dealser because that is what I paid for mine when I bought it.
My set up comes with the choke and linkage.
They are restored perfectly and they were done by a private restorer that does the majority of carb restorations on the high dollar car restorations on the east coast.
These are 1970/71 carbs and I have them listed for $1675.00
I am willing to discuss the Thunder 800 if you want.
Here are some pictures of the carbs, manifold and other parts.
Please let me know if you are interested.