1911 C parts

[my45]

Hi there, I'm in desperate search of original Colt 1911 Commercial parts. I recently bought a Commercial 1911 from 1914. The blueing is +90%. One of the former owners swapped some of it's parts for parkerized 1911A1 specs. Since this pistol deserves to be restored, Parts needed are: a flat mainspring housing, grip safety, barrel bushing and plug. They don't need to be perfect but should come close to a Colt with an +90% blueing. Can anyone help?
Thanks. JL