Here is a nice Nitro Technomic Stem: just what you need to convert from dropper to flat or upright handlebars.
22.2 Quill: For 1” (25.4) threaded steerer.
25.4 handlebar clamp.
80mm horizontal extension.
I am across from the Mosholu entrance and Metro North station of the Botanical Garden. (I am also near the Fordham MN station and the B,D and 4 trains. I can also meet you in Manhattan.