HI,
that's not totaly true. If you have a look at the feature navigator (www.cisco.com/go/fn) and search for WCCP Layer 2 PFC Redirection, you will see that there are a lot of plattform supporting this.
From my knowledge this feature was introduced on the Cat6k plattform.
Just have a look at the FN to verify if your HW/SW supports this feature.
Kind Regards,
Jerg foerster