Not easily...it would require creating the character and adding it to the font. While the Windows symbol is not an option, you can go to

> System Preferences > International > Input Menu and select the Character Palette and check Show input menu in menu bar. Then go to the input menu (the little flag) in the upper righthand corner and select the Character Palette...there are tons of characters you can add to file and disk names by setting the insert point and clicking the insert button on the Character Palette (just not the Windows symbol).