I've got a full tunnel length U-Cooler made by Fabcraft for the Edge Chassis for sale. It was made for a 151 tunnel and would work on anything from 151 and longer and may also fit a 144 but not sure.
I'd have to measure it and at the moment I'm on the road for business.
To give you an idea of what it is though it was custom built for my 05 XC 700 that I extended and put a 151 under it. It might be just a smidgen long for yours. I'll be home friday and I'll post the dimensions.