Many resources in Logos have the Greek translation of Sirach,
but to my knowledge is there only one resource for the Hebrew original:
The LXX/MT Parallel as seen here.
But for edification, that's not exactly easy on the eyes like say AFAT is. I'd really like to see something like AFAT or the Lexham Hebrew-English Interlinear Bible (LHI) for this important Hebrew book. I also wonder if you're planning to do something (or have already) for the original Hebrew Sirach text with your new Textual Variants tool.
All the Dead Sea Scroll and Genizah manuscripts are available for viewing here:
http://www.bensira.org/
But obviously that website is not searchable in logos 
Apparently, the French scholar called Jean-Sébastien Rey is producing an entirely up to date version of all the manuscripts along with textual commentary (in French), which may be of use.
Here are the links for that forthcoming work:
https://www.eisenbrauns.com/ECOM/_49A1ELZE9.HTM
http://booksandjournals.brillonline.com/content/books/9789004207189
