newbie with front floor replacement

[Jvan]

I'm new to the board and have a 72 4x4 blazer that I intend to restore. The first task I need to tackle is replacement of the driver and passenger floo. I have to strip out the interior to see how much rust is there but it looks like I need to replace the entire floor from the footwell to the where the rear foor rises up behind the seats (guess there is a cross member there). My questions is should I buy individual driver/passenger floor repair panels or the new single one piece floor replacement panel I read about? Is it avaiable and how good is it? I'm new at this restoration and will need to have my son do the welding since I don't have that skill yet.