BQ79616-Q1: Stack configuration and Isolation Transformer

1. I want to configure 36S battery module with balancer.

When I use 3 bq79616, is it possible 12S + 12S +12S configuration?

2. bq79600 and bq79616 recommend HMU1228NL for isolation transformer.

But there're no stock in Digi-key, Mouser, etc.

Could you tell me alternative parts?

Best Regards,

J.H. Shin