I don't see a Colt DA .32 with 1900 patent in either Blue Book or Flayderman. It is likely some sort of late issue New Pocket or New Police before the Positive Safety action came in around 1905.
Parts are going to be scarce and fitting difficult.
Unless your name is Turnbull and he has a couple of thousand dollars to spare, it doesn't look very hopeful to me.
I would clean up any rust and frame it with the good side out for display only.