Beta Coupe Floor Plates

[swilkes]

I have some small areas of rust I need to repair in the floor of my 1983 2L Beta Coupe.  However, there is a pattern to the floor (set of ridges running parallel to the vehicle).  This can all be sorted, but I wondered if there were pressing plates for the floor which might make my job simpler (i.e. replace the entire floor).  Any ideas/suggestions, or should I just get in there a repair it.  Thanks in advance for any help.