I used Drakes running boards with no problems, I bought the smoothies though. Drake has pretty high standards for his parts, if he isn't happy, they go back to where they were made. The running boards with the rubber were quite expensive, IIRC. The patch panels, I am no help, we made our own patches. I would think your bodyman/welder would know how he wants to tackle this. Keep in mind, the fenders like to split in the wheel opening radius, I side sme round bar tacked into the underneath edge to reinforce.
"When I was younger, I could remember anything, whether it had happened or not." - Mark Twain