mate, though wes has some ultra rare / one off fishes. a significant amount of what he gets hold of can be got in the UK. seriously I used to stock loads of cool rare fish when I ran a fish room. rays, arowanas of every species, nile perch, tanganikan perch, tiger fish, wolf fish, puffers (fahakas, MBU, sea frogs, red eyes, congo puffers lineatus, Fugu), swamp eels, fire eels spiny eels, freshwaters morays (3 species), chaca chaca catfish, myriad african cichlids. all the polyperterus ( even lepradei, endlicheri) lungfish, leaf fish, loads of big south american pimeloids, gars (spotted, florida and gator). not having a pop at you mate, but it is really easy to import these "unusual" fish into the UK. Try and find a aquatics shop that deals with the trade supplier "neil hardy aquatica" they stock all these species and tons more throughout the year. then you could order them from the shop.
all the best expanding your collection.
sorry for going off topic, wes your collections and knowledge are astounding.
in a bit mate,
G