My original trim is the silver aluminum finish, but I switched to black.
I found used 51717003935 (left) and 51717003936 (right) black trim pieces from a part out, got both for $100.
I also bought matching black lower 51368194741 (left) and 51368194742 (right) window trim pieces new for around $30 each.
It is not worth the money and hassle to replace them just for the crumbling black rubber strip. Just cleanly cut it away so it’s not noticeable and you’re good.