Not 100% sure if this will help you, but have you thought about using Gargraves or Ross Custom Switches for track?

Lee

I bought a large lot of O27 track a couple of years ago. I have a BUNVH of extra O72 curve track that I will NOT be using. How nany do you need? I will go count what I have and can spare (I will keep a few, but not for full turns. I do not need O72 turns, but the track is useful here and there).