Hi there Ali - I hope you're managing to enjoy yourself back home in the midst of this turmoil!!!
It did cross my mind to suggest you letting your ex know about your ex-ex - but that would be mean - this must feel like a very difficult sea to sail on right at the moment.
Your ex is sounding more and more as if he has to deal with stuff in his own way and that must happen before any progress can be made...the thing is though - will you still be there when he has...I saw your post earlier about your assessment of the potential situation - and I think you're spot on - but you're not the sort of person who would want to hurt anyone - so that puts you in a tough spot regarding the ex-ex.
Nothing much to offer I'm afraid apart from best wishes...