Those "posts" are fuel vent tubes. I made mine from tubing that can be obtained from some hobby stores. They are brass tube stock, 0.219in OD, 0.012in thick wall, 12 inches long. Cut the tube stock into 1.35in long sections, and then cut a slot in the lower end, 0.030in wide, 0.375in long. A Dremmel tool with a saw blade will cut the slot. Lightly roll the upper end. If the end is rough, use 240-400 grit sandpaper. Do not grind.
Jim