I was on 435 mounts and got to 441 today, believe it or not!
(All were done on my main, I don't farm mounts on alts)
Got chasm leaper from a random island
Got Qinsho from snowblossom salvage
Edit: also just got Felblaze Infernal!
Edit 2: Got a great sea ray after using hyper compressed ocean for about 6 minutes!