I did a quick search using Google and found a long list of breeders. Since I do not know where in Indiana, I thought it would be better to just recommend you doing a search. I used the words, "Nubian goats indiana."
I do not know if these breeders are good, but I bet you could check with the AGDA if you wanted registered breeders. I would find out as much as possible about the breeders and farm before putting money on a goat, though.
You may need to put a deposit on a doe before they are born. It's kidding time of year, so one should be available.