Who else is thinking about doing this?
j8064 was my Buddy for the CMP 2018 Garand build class. It was a great experience; I highly recommend it.
Both of us are very proud of our personally built Garands.
My Sig P365XL has a Sig Romeozero 24mm. I'm very pleased with the way it works with this pistol and how the package fits in a Remora holster.
https://www.sigsauer.com/romeo-zero-1x24mm.html
A Browning BPCR Rifle .45-70 is one that I suspect is still available now. It is a modern version of a 1885 High Wall Rifle.
Check your PMs for owner's contact info.