Muck as it pains me (It REALLY doesn't) to say it, your Uberti is probably a better built gun that many (a lot really) of the Third Generation Colt built guns. Colt hasn't been interested in producing a quality SA for a long, long time. A REALLY long time. Paying the kind of money a Colt sells for (Third Generation) if you intend to shoot it would be foolish. You'd soon find you get a much better shooting gun from Uberti or Pietta for a LOT less money.
You DID NOT screw up. Oh, and by the way, no two sets of SA grips are the same. The Grip is fitted while the frame is "in the white" so the fit is precise. I'm pretty sure, Colt quit doing that a while back.