I sat down and created a set of telephone poles with additional items for a resin printer. You can get the stl file at: https://www.tinkercad.com/things/lQNXBHmuKSz-telephone-pole-n-scale/edit I set it up for single, double and triple crossbeams. You can edit the file. No commercial use license. I made them to take the Plastruct 0.030 rods for poles, or you can add the pole(s) to the build file. They print very nicely at 30um slicing. If you keep the size, they are just about the same at Atlas telephone poles for N scale. Sorry the picture is a bit fuzzy, I think I got too close for the phone camera...
Very cool! If you want to use wooden poles, the local crafts store had dowels that were 5/64" diameter, scale to about 12-13" diameter. I used them for my telegraph poles. https://www.tinkercad.com/things/40Yf0RBMyJr-telegraph-pole-crossarm-10