I think you would be a let o get into the tube running boards fairly easy and allow for direct bolt on and still keep the coolant running thru the sides.
I have a set that was built by one of my bros, but he was not interested in selling them in mass (all hand bent)..i flipping love mine..
You would have to make them for different 900s tho, ie 144/151 tunnels, and 159/166 tunnels...and whatever the fusions run...
Here are my boards on my 05 975 big bore.
My other idea I was going to make myself when I get back from Korea is...
Like someone mentioned above, the side panels due tend to break, a lot! My first project is making a lot of carbon fiber products myself...but also going to make a side bar that goes on the inside oft he side panels on each side. They will connect to the footwell/steering hoop and to the side of the bulkhead where the side braces connect. This will allow the stress to be applied on the bar and not allow the side panel to push in very far (if any)...not a perfect design as I can break an anvil, lol..
But they need to be easily removed to get access to change belts...but I am mainly wanting to do it to protect my turbo on my 06 900...I have some pics of some made for dragons back in the day by a friend but are no longer made (I'll post pic shortly)
I've had a Few things I thought would better the 900s made (and sold to fellow snowesters) but have to keep my loyalty to those guys with those products. But the running boards are free game lol