They have everything you need, and nothing more.
...except that mine came well-fitted one-piece walnut grips, and the
whole thing cost as much as USFA wants for swapping out their standard hard rubber grips for one-piece walnut grips.
Granted, the finish on the USFA grips is higher-end. However, by USFA standards, I bought grips and a hammer, and got the rest of the gun for free.
I was not suggesting that USFA was going to make a utility 1858, only that their "upgrades" should be standard at their price point, and either way, the upgrades are overpriced.
Therefore, their deluxe 1858 is unlikely to be a penny below a grand, and it seems likely that they'd charge extra for finishing the hammer.
I'd pay for USFA quality, though I have yet to buy one of their guns, sorely tempted though I've been. I understand the value of that quality, and the cost of gunsmithing, as well. But some of their options pricing would make me feel like a real sucker.