You're probably not going to like this, but the separate modules on the passenger side of the engine bay are 1996 - 2000. 2001 and 2002 use an ABS system that is integrated into the master cylinder. Instead of a skinny metal conventional looking master cylinder with lines that lead to the other side, you probably have a more complicated master cylinder that looks like this:
I get the impression that they are spendy, and have a higher failure rate than the earlier standalone units. I notice that they're always missing on junkyard 01-02's as well.