I can manufacture a set, I would not count on a place like Midas to make nice bends, even if they have a mandrel bender its likely their dies will gouge the tube. I would purchase bends online, they are not all the expensive and weld from there. A short piece of smaller tube for making sleeves makes things easier. I considered them on my I20 but concluded that I didn't even use them all that much on the old hobie.

Not familiar with a blade, is there a track in the beams that could be use? Otherwiser some AL plate could be cut on a water jet to support the tube inside of the beam.