There are several sheet music versions (the first few in F) at The Levy Sheet Music Collection - type Minstrel boy in the first seach box (I don't think I can do a direct link to the songs at Levy, they're temporary IIRC, so you need to go via the search).

There are also numerous version in D, G, A and Eb at JC's Tunefinder - The Minstrel Boy.

Mick

to link to an item at Levy Sheet Music open the item to one of the pages and link to that URL. The searche results themselves cannot be linked.

for example - you can link to http://levysheetmusic.mse.jhu.edu/cgi-bin/display.pl?record=110.146.000&pages=2 j-clone