Replied by Liz (Boston, Ma) on 04/05/2016
http://www.fermentedfoodlab.com/how-to-make-raw-pineapple-vinegar/
There were many more links on how to make your own pineapple vinegar. Just Google 'pineapple vinegar' and you'll find them. If you Google 'how to make pineapple vinegar', you'll probably find even more.
Good luck!