Front sight identification help

[Hanz]

I stumbled into my first 1874 Shiloh Sharps and the front sight is missing the spirit level and one of the thumb screws that retain the level itself.

I could use some help identifying the make and model so I can attempt to get the missing parts along with some additional inserts for it.

Does anyone know what this is? Any and all help is greatly appreciated.

From the side:

Shiloh Front Sight by Doug Hansen, on Flickr

Top view with the insert retainer/spirit level holder closed:

Shiloh Front Sight by Doug Hansen, on Flickr

From the top with the retainer opened up:

Shiloh Front Sight by Doug Hansen, on Flickr

The retainer and insert removed from the sight:

Shiloh Front Sight by Doug Hansen, on Flickr

The rifle itself:

Shiloh Front Sight by Doug Hansen, on Flickr

45-70 with a 34" bbl weighing 11#s. I am so happy to own this and can't wait to shoot it.