I broke a transfer bar in my Blackhawk a few years ago. I tend to be one who likes to take things apart and I'd have to say that a Blackhawk/Vaquero is a pretty simple handgun to take apart and put back together again. If you do this however, you might want to make sure you have the correct punches if you want to be sure not to mar up the pins and/or not gouge up anything on your gun. I got my extra parts from Ruger. They will sell the parts to non-gunsmiths...at least they did a few years ago.
One word of caution; be careful not to scratch or gouge the surface of the gate detent spring when re-assembling the gun. If you do this, the gate will not open correctly and you'll probably end up gouging the hinge surface area of the gate. If this happens you'll end up making a second order from Ruger for a new gate and gate detent spring and have to do the whole process over again. I know, because I did this the first time I took my first Blackhawk apart. Aside from that word of caution, if you're a handy type person, one could probably take apart and re-assemble a Blackhawk (New Model) in about 10 to 15 minutes...excluding barrel removal of course.
Good luck!