That's exactly what I did. I found a NOS front fender on eBay that I had shipped from the UK. In the end, it was way cheaper than re-chroming. The hardest thing to find are the original pipes in good shape, especially the muffler.
That F looks exactly like the barn find I started with for my restoration. Here is the post with pictures of the process and the finished restoration: https://www.cb750.com/threads/1976-honda-cb750f-super-sport-fully-restored.9075/
Here is a link to photos I took right after taking her out of the garage. Lots of detail. Ask if you have any questions or want any additional photos.
https://photos.app.goo.gl/KGKRB2CVq2kiLVjG6
The time has come for me to part with this beauty. It was a frame-off restoration from a barn find that I finished about 3-4 years ago. Original color from factory was red, but I finished her out in sulfur yellow.
She was gone over completely and is as fully original as possible. Everything was...