I actually bought that thing you showed a link too. I ended up returning it. If that is the only difference then I will leave my alone.Only thing different is the front one on the SV is called a "splash guard", the Pro4x is an actual skid plate. Everything you need to replace your splash guard with a Pro4x skid plate is here...
The "Splash Guard" is a pretty decent thick metal plate already, I just wondered if there were additional plates somewhere that my SV 4x4 doesn't have.
Thanks for your reply much appreciated..