Rocker replacement questions

[conoco]

I am looking at ordering the parts for my rockers. Everything is in pretty good shape but the front and rear cab supports should be replaced. They are all there but they are starting to be eaten through around the middle of the support.

My rockers however need to be replaced. I was looking at just ordering the "Outer cab floor extensions" which is what i need to completely replace some of the eaten through areas just on my rockers.

My question is ( With the outer cab floor extensions, do I need to still order the rocker panels? I was thinking that the floor extensions had the rockers built into them ands was all one piece) Is there anything else I need to order along with the floor extensions? The pillar mounts are good. I sanded them down and there is no eaten through areas. I do need to replace the bottom door panel but i will wait until after the rockers are completed.

Any advice would be great. Thank you.