A friend of mine, Yoz, has been working for a few weeks on a complete set of sprites for PS1. I've just published the first version of his work:
http://gazetadealgol.com.br/diversos/sprites/start
It's really an amazing job. He captured sprites under two different resolutions, and he went as far as capturing every single frame of movement. There are still a few sprites missing, and he is currently working on it.
Hope you like it!