Where to find 0.6.0a8 model

Where can I find models for the 0.6.0a8 binaries? (Specifically for the pi 4)

We have not yet released a v0.6 compatible model. So you would have to train and re-export yourself. This patch could help you re-use v0.5.1 checkpoints for that: https://gist.github.com/reuben/b68b9085f7b293580f8431156a33daa9

Do you have any guess on when 0.6 model might be available?

We do not yet, sorry.