Shell support rubber pads

[TinCocodrie]

Hi Group
2009 3023
The rubber pads on top of the frame are being cut in half by the shells when closed for travel
Have not taken many trips but one from La to North Carolina
I plan to replace the pads but does anyone have a better pad that will support the weight and not hurt the shell?
Do you buy the new pads from the factory or can you make your own?

thks
Terry