A Ruger Vaquero would also work.
That said, to have the engraving and other gun smithing work done to make the gun look like your image you are going to spend a boatload of money. The engraving alone is likely going to run you easily over $2000. Figure you will need to have the frame refinished after that and on a gun with so much engraving labor you are going to want a very high polish blue finish (figure another $500) just for that. Want the frame color case hardened? Tack on some more money.
All in all, I would guess if you are starting with a plain base gun, your gunsmithing, engraving, refinishing, etc... is going to run you north of $3500 plus the cost of the gun.
From there, you will need to find a GOOD single action gunsmith. I would suggest guys like Jack Huntington, Hamilton Bowen, Andy Horvath, or Alan Harton (colt SAAs only).
Figure about a 6-9 month lead time on the gunsmithing work, maybe a year for a good engraver to get around to doing your pistol, some time for a place like Turnbull to do the color case hardening on the frame. Back to the gunsmith for final assembly and any cleanup work.
You are probably looking at almost 2 years until you get your gun back.