The shower panel itself was still working and did not need a replacement. All that was needed was a repair to the roller on top and holder below.
Our handyman explained the process to the owner over the phone and the tenant that was living there. We proceeded with the repair after everything was explained (see picture below) and the whole repair took us slightly under an hour. After the repair was done, the tenant inspected the work to ensure that everything is working.
At the same time we helped tighten another shower panel to the right complimentary (not captured in image) so as to prevent something like that from happening in the future.