I need them as well. When i started pulling out the muddy & stained carpet to herculine it,, i then found holes from the rust, alot of rust!!
I have 2 decisions here............
1.) Buy an entire floor pan and do the job the right way!! Its alot more work,, BUT,, the unibody will be stronger with a thicker guaged metal. It will also look super clean after its herculined!! Last i looked, i remember $157 for the ENTIRE pan that even had the tranny tunnel and all!!
2.) Piece by piece, cut out anything that is no longer usable and anything that has to much rust!! Then hit the remaining metal with a whire wheel using either an air or electric one that is powerfull. Clean it up good for strong welds, then u can start cutting and welding in your pieced together floors!! Pretty sure this would be less time and money then the entire floor plan,,, but just remember that ur herculined interior wont be as nice nice looking!!
Im gonna go look at some pricing myself.