Working on my ground up Shadow restoration that came from a container buy several years ago. The two plastic ball ramps or tubes that are mounted to the backboard section are destroyed. The one behind the battlefield was screwed on right through the side where the ball hit the screws each time through. Most of the parts places list these, however they are always sold out. Checking to see if someone had a source for them or if someone tried a different approach. I was looking at making a short brass wireform or even bending some plexi myself. If you had this issue I would be interested to see how you resolved it.