I haven't seen this part as a separate replacement panel. (Maybe someone will prove me wrong)
If your floor is good you might be able to salvage a riser from a junkyard AD.
If you are careful with a spot weld drill I don't see why you couldn't remove one without butchering it.JMO

Last edited by jockbolter50; 08/17/2009 2:19 AM.
1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.