I've got the one from the Outcast-version demo. It should work in JKA, but I haven't tried. I'd like to post it up here, but I haven't got the whole package (ie the readme file), just the pk3. While this will obviously work
, it's not very respectful to the folks that made it.
I believe they're going to release all the assets from the project after the final demo, but obviously that doesn't apply until they do it.
So in short... what he said
Ask 'em over in their forum!