The instruction tuning dataset is only 52,000 rows. It shouldn't be too hard to crowdsource high-quality human answers to this many questions and retrain the model, nixing the dependency on OpenAI.
I'm not sure why the authors of Alpaca didn't try to train it on this dataset.
> Can I download the data?
> You will be able to, under CC BY 4.0, but it's not released yet. We want to remove spam and PII before releasing it.