I just completed a similar project... I'll post pictures of "The Farmhouse" soon as I clean 'em up. I used balso wood for the banister itself, wooden dowels for the stair support post, and as mentioned earlier, I went to the local doll house shop in Dallas (so EMBARRASING with all those old ladies running around!) and purchase some 1:48th scale (or 1:4 inch) staircase ballister rungs. I intenetionally got a little longer version and they look great! Since they are wood, they stain just like the bannister and support post, and the overall effect is really nice. Keep an eye out for this 100% scratchbuilt project.