Has anyone successfully replaced the corners of the tonneau cover?

I had a new top installed recently, and the installers damaged the tonneau cover as seen in the pics below: The corners seem to have a plastic weld, so I don't know if they're replaceable or if a new tonneau cover is the only way to go.

I had a new top installed recently, and the installers damaged the tonneau cover as seen in the pics below:

The corners seem to have a plastic weld, so I don't know if they're replaceable or if a new tonneau cover is the only way to go.

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