This hatchery ships to all fifty states, and they specialize in muskie, tiger and pure-strain both:

http://www.trophygamefishinc.com/Lake_Stocking_Recommendations.cfm

If none of your bluegill are over 6", they're probably overcrowded, especially if you see a lot of them. As Eric noted, the HSB probably won't thin out the bluegill appreciably. Fifteen or twenty tiger muskie would transform that lake and give you bigger bass and bluegill both.