Howdy Goldwing,
OK, I am back from my surfing the net. However, not with good news The Unicorn site I had mentioned apparently was recently aquired by some company.
But......., I did a search on the cardmodels.net site for "unicorn" since I knew I had posted the unicorn link there and I also knew there were other "horse" links posted too. So, the best I can do for you are "not so sophisticated" race horse models. These model even include the jockeys lol. There are horses with all sorts of names...even seabiscuit.
here is a pic of the models....like I said, "not so sophisticated" :
Here is the link to the models, seabiscuit is about 4th or 5th from last:
http://www.h6.dion.ne.jp/%7Eph12s/papercraftno.html
I am sorry I couldnt be of more help to you, occassionally someone will stump me with a cardmodel I cant find, and this is one of them, so consider yourself in an elite group lol.
Have agood day,
Greg
ps, now if you had wanted a south american armadillo or a tree sloth, I could help ya there, but nothing as unexotic and mundane as horse lol.
If you would like to look at more animal models, including a zebra, you might look over this page of links:
http://www.spacestation42.com/pt-animals.html