Bob and Bob,
To deal with liability issues, Uberti and Pietta are going to make more robust revolvers that are not quite the same as the originals. However they are fairly close and they are affordable.
To get the "real thing" you will need to buy a Uberti or a Colt 2nd generation and send them to an artist such as Raven to build the Richards conversion for you. I think the current price is $1500 and there is a 2 year wait.
An in between would be a Kirst Konversion of a Uberti, Colt 2nd generation, or Pietta fitted by Kirst or a gunsmith like Hoof Hearted who are familiar with them.
Frankly, there's no wrong decision. Its just a matter of how far you are willing to go to get your wish.
Justician