Most Scottish pistols were all steel, at least those called "Scottish". There were Scottish makers of traditional English pattern dueling pistols but what collectors call Scottish pistols were mostly stocked in steel. Some early Scottish pistols from the 16th and 17th century had wooden stocks (mostly fishtailed). The Rifle Shoppe sells parts for an all-steel Scottish pistol. I have a set and it is generally pretty good. The barrel they sell with the set is not correct and needs a lot of work. With respect to dueling pistols (and I am referring to English dueling pistols), there are no commercial precarved stocks that I have seen that really duplicate dueling pistols. For a pistol from the early 19th century you could use the trappers pistol or Hawken pistol stock. To be correct you would have to be prepared to checker the handle. No one has a stock that really copies a good 18th century English dueling pistol. You could use a Kentucky pistol type stock or the English Officers stock previously mentioned, but they would make rather poor copies of real duelers. Furthermore, no one appears to sell trigger guards that are accurate for duellers. They tended to have large bows with plenty of finger room. All of the pistol guards that I have seen are too small. Later today I will post some pictures of dueling pistols that I am making. They may give you an idea of what you need to look for.
