Thought I'd give you guys a little heads up before you (The Server Owner / lulz) go asking for more item ids.
Very simple to find what you seek. Open your StringResource, (DATABASE) then enable SQL query modification (Little white button that says SQL)
Type:
WHERE value LIKE '%Serenity%'
This will bring up all game texts that include the word 'Serenity' now scroll down your results until you find the desired entry:
e.g.
Staff of Serenity, look at the 'Name' column, if it says name_item_xxxxxx then it is the name entry of the item, now open your ItemResource and open the modify SQL Query (Again small white button that says SQL) now type WHERE name_id='xxxx' <--- replace the xxxx with the code in the row of your string resource entry.
Press F5 and now you will be looking at the item entry for the Staff Of Serenity