WTB floor section cut outs or scrap, my car’s back window leaked & there is rust in the floorpans under the seats. I rather patch than put in whole floors so I could used some cut out sections or use flat sheet

That's where they all rust, you're better off getting a pan from restoration design and cutting it to what you need.

they sell rear sections. Price and shipping is very reasonable.

http://www.restoration-design.com/store/product/PP345BL

http://www.restoration-design.com/store/product/PP345BR

Nothing like welding with new metal. Just saying .............