I can't answer the part about being true to originals. Dr. Davis might be able to.
You could post the question over on the Collector's Forum:
http://blackpowdersmoke.com/revolvers/index.phpIf you are not a member I can fix that in a hurry (yep; admin there, too)
Not a lot of traffic but the guys know their stuff.
As for the cost, well...it's a Colt brasser. With a Dragoon-style barrel. If you have a Colt brasser you could buy a barrel and make one. Or if you don't you could get a hunnert-dolla-brasser off one the auction sites. IMHO 2 bills is too much for any brasser, new or otherwise.
Personally, I love what Brazos Dave did with his.
http://blackpowdersmoke.com/colt/index.php?topic=511.0I'd be reluctant to do that to a new Pietta, but some old' thang I won off Gun Broker? No problem. In a heartbeat.