Your idea of using one of the round tube pipe hangers like you see on the newer 4 strokes would be the best option. My originals had welded tabs and they vibrated and cracked. Once I did them with the round tube clamps with a rubber isolator in the top bolt hole, the excess vibration went away. Way more pleasant to ride. Plenty of options from summit, jegs, and other bike/atv suppliers. https://www.budracing-usa.com/us/replacement-stainless-bracket-with-alloy-red-support-for-bud-racing-2-stroke-silencer.html