I posted this in the second gen forum but moving to this one in hopes for better visibility. I have a 2003 XLT 2WD with rusted inner and outer rocker panels. Replacing/repairing the outer rocker has been well documented and I have plenty of information to tackle that task. My issue is the inner rocker panel. The rust is quite severe towards the rear of the vehicle to the point that the inner rocker is rusting away. The running board flexes when I stand on the rear because of the degradation. So, in saying that, what is the best method of repair? I see the Ford part number is 2L1Z-7810110-AA but has been discontinued. Will a 2007 inner rocker fit? Or, should I just cut out the rusty sections and weld in new plates? I'd like to continue the use of the running boards if possible. The floor pan had very little rust and already has been addressed. Above was the original question. Below is an addition: I will add that I did locate 2003-2006 inner rockers. Also, when under the vehicle I noticed what looked to be adhesive mounting the inner rocker to the body. I didn't look too hard but I didn't see evidence of welds. Is the inner rocker mounted with structural adhesive only or spot welds plus adhesive? Cost wise I have very little into the Expy and only have 101,xxx racked up. I'd like to dispose of the cancerous rust and prolong her life. Frame is solid. Minor surface rust patches that I've already knocked out and coated. I have an experienced welder on standby and would like to avoid the costs of a bodyshop. I can do all of the cutting and prep work as well as paint. I just suck at welding. Replacing both inner and outer rocker would allow me to address the root cause of corrosion to minimize its chance of returning. Thanks in advance.