The source is up in the downloads section. Unfortunately, there was a lot of data padding on the floppies which means that there was not a lot of source. Anyway, it's up for those interested.
Sorry to bump an old thread here, but I only stumbled onto this now. bitrate, can you explain what you mean by "there was a lot of data padding on the floppies which means that there was not a lot of source"? I've glanced through the source files and I've seen sub-routines for pretty much everything in the game. Are you saying that theres a bunch of source missing? I'd imagine the only thing thats missing is the console's SDK. And even though this is labelled 3DO, it does seem like its PSX code as "Sony" is plastered all across the comments in these sources.