I don't recall ever making an image using a centaur, but looking through the archives I see I nonetheless have two of them from the old
Poser 4 freebie era. For the sake of nostalgia/history, I made a quick render of each. I doubt very much you could still obtain them anywhere, though I'll give the info anyway; maybe those interested could get lucky on the Internet Wayback Machine. Neither figure meets
Posette Forever criteria for uploading to the files section, or I'd just share them here-- or, a person with
Poser 4 could rather simply make them on their own, as they aren't custom figures in any way.
On the left, example A is a male centaur by PD Blake, who according to his readme had once upon a time a website at
www.poserstore.com . Apparently ole PD just took a P4NM and stuck it on the P4 Horse. Whether by design or as an embarrasing oversight, the poor chap seems to be a mare from the waist down

. If you could find the model anywhere (doubtful), it wouldn't look quite like my example image, as the maker forgot to include any textures at all for the model, so I had to provide all those myself for the render.
In the middle, example B is a female of the species by Nerd, whose ancient (but thriving at the time) website as I recall was nerdworks.com . Like her stallion counterpart, she seems to simply be a
Posette stuck on a P4 Horse. For the render shown here, I provided my own texture for the old P4 Long Curls (that hair came with the model, but without a texture) as well as a bump map for the horse part of the body.
From the images you've been posting here you seem also to be interested in faerie-folk. The only thing I have in the archives along those lines is the old Robyn Ravenhair figure by Thorne (example C), who had a bit of fleeting fame 25 years ago at
Renderosity. Though she hasn't any wings, I guess she's supposed to be some sort of fairy lass. I find her creepy (I like my Posettes to be grown women, rather than so, eh, 'youthful' looking

) and have never used her as a model, but as I recall she was quite popular with other
Poser 4 artists at one time. Once upon a time, Thorne had a website at Thorneworks.com .