I did receive the full size inner cowls but they are painted black? I had looked at getting the half panels but was concerned that they were too short to resolve the upper end of the damaged area on the original panels. I could order the lower half panels as you suggest but wonder if the problems that you experienced were related to panels from a different supplier.
I have laid the floor panels over the existing and they seem to overlap rather than having a gap but the assessment is very preliminary.
I did reattach the rear cab mounts to the cab and installed the driver's side front mounting bolt to secure the cab in location. When the weather improves I plan to start work on the passenger side floor/inner cowl area as the mounting hole on that side is in poor condition. I plan to shim the cab floor to the frame as far forward as possible to provide support prior to removing material.
On a separate subject can anyone provide tips regarding running board bolt removal? I am not sure if they are original but the bolts have square nuts and the best fitting socket I have is a 13mm 12-point. The bolts start to rotate once I get the nut loosened and given how everything is tucked up inside the mounting frame and under the running board it seems impossible to access the bolt to prevent rotation. I wouldn't mind cutting the bolts if I can find a way to gain access to ensure that I am not cutting anything except the bolt.