Well, yes. The D-frame Colts (Cobra, Agent, Detective Special, etc.) make very efficient use of space. The Police Positive Special (4" service pistol) which was their parent was every bit as good a weapon as Smith's famous Model Ten, but trimmer all around. It is disappointing that Colt freed itself of that product line in one of its soap opera, ongoing saga reorgs and bankruptcies.
Back to the OP: Somebody already said it, gunsmiths who can fix Colts and do it right are somewhat rara avis, like car mechanics who really know BMW. Parts are via the secondary market, ask Numrich first. If you feel like dealing with all that, a Cobra might suit you down to the ground.