Yes—an independent camera repair specialist may be a good option, especially for an out-of-warranty lens with likely internal misalignment from impact. One community recommendation is to avoid general camera retailers, since they often just forward equipment to the manufacturer rather than repairing it themselves.

Two respected US repair shops mentioned were:

• Oakland Photographic Repair in Madison Heights, Michigan
• Midwest Camera Repair in Wyandotte, Michigan

According to the shared experience, Midwest Camera Repair usually performs repairs in-house and has a reputation for timely service.

For impact damage like focus errors and strange bokeh, the lens likely needs professional inspection and optical realignment, so this is not a DIY fix. Before shipping, contact the shop to confirm they service Canon L-series telephoto lenses, ask for an estimate process, turnaround time, and shipping/insurance instructions.