Oh man... As I get ready to move house, I'm being confronted with just how much plush I have to pack and haul, haha.
It's mostly cats/big cats, but a small collection of lambs, a good-sized collection of buns, maybe five rats/mice, a couple dragons, a couple octopodes, three to five foxes, a couple hedgehogs, a couple seals and a whale or two, a wooly mammoth, a giraffe... some other really random one-off critters, too. A few bears and a couple elephants...
I'm going to have to pare down and let a lot of the big plushes go to new homes, but it's not easy. I mean, I've got, like... lifelong relationships with some of these guys. I've had that wooly mammoth for over thirty years!
As for where to find them... well, it's harder if your favorite animal is less common. I'm afraid with felines, foxes, and bunnies, it's more a case of not buying all the great plushes I run across-- especially with the cats and buns.
With my octopodes and other uncommon critters-- well, a couple have been gifts and I don't know where they were found, but zoo, museum, and aquarium gift shops can sometimes be great sources of odd animals, and Amazon has turned up a lot of cool plush Australian animals.