the indicator stalk and the windscreen wiper stalk are seperate and both have a round collar at the steering shaft end with various electrical circuits on them.
sounds unlikely but have you tried an Audi dealer?
cant speak for the wiper arm but the indicator one was available at a mind numbingly [b]cheap[b] price of less than £20 a couple of years ago.
obviously things go nla quickly in this world but they are common across a wide range of that eras models
- just noticed the bit about voice synthesiser switch- persumably for a wr? this may make things more tricky?