Make your own? For the latter you can try scaling down and chopping up the limbs (urgh). In any case, I don't remember the character sprites being very high resolution, so if you do it right you won't notice loss of details or anything.
(Reminds me about the time when I made my Minecraft skin. Took a stone golem (similar to the one you see in my avatar, except is in sprite form) scaled it down in GIMP, copy and pasted bits, then edited a lot of pixels. Shouldn't be too different here.)