Don't know about ceramic wire- never heard of it (it sounds like an oxymoron). However, fine thread is getting hard to find. My local craft store says sewing is declining as a hobby. I now find the best, finest thread in sources catering to model ship builders, like Model Expo.
For airplane rigging I use monofilament, since I generally do not need to tie knots. Sailing ship rigging is something else, the flexibility is important.