Here is the standard way to make use of the Convert Lead and Find Duplicates functionality.

/lead/leadconvert.jsp?retURL=%2F{{Id}}&id={{Id}}
/lead/leadmergewizard.jsp?retURL=%2F{{Id}}&id={{Id}}

In my opinion, there is not that much to gain from attempting to create a custom Skuid page for this functionality. One thing that can be done is to remove the header and sidebar. Add the  URL parameter “&isdtp=vw”. This is especially useful if you’ve created a “skinned” experience of salesforce.