Browning 1885 Hi Wall - Tang Sight

I am posting this in Single Shots and BPCR.

I have an 1885 Hi-Wall .45-70 manufatured in 1996 that I would like to put a tang sight on. It is the Browning model and there isn't a visible tang to mount it to.

One of my sons, a nephew and a second cousin all fancy trying to become a Quigley so I thought I would fix mine up.

I find they make models for it but I am not sure which one to get. I do want one with adjustable windage. I would hope I can find something appropriate for use to 500 meters with 405 grain bullets.

I have had this type of sights on a 94 Winchester, 1899 Savage .250-3000 and a Savage 99R in .300 Savage, I am quite fond of them.

I really don't want the expense of a vernier sight so this style will have to do.

Thanks in advance for your help.

Gary