I have an extra set of original door sill plates for the MSM; I assume they're plug-and-play for any NB. Not sure about NA. No scratches and nicely engraved with the Mazdaspeed text. $75 plus shipping from 07081.

Here are some pictures from my terrible cameraphone.

Fronts:


Backs (shows mounting clips):

 

Price reduced to $50 + s/h .... the sills are quite nice and silver and shiny .... just lousy pictures above.