Lucasfilm Licensing Art Reference Helmet
Come to think of it? If I saw an inside shot of the helmet, I might be able to confirm which 'that' helmet was intended for. Statue, or stand alone release.
The statue version had a heavy plug installed in the dome with a really big square registration 'key' that epoxied to the neck of the statue. But even without the plug present, there was a bit of a mounting ring around the inside of the dome on those castings. If the ring isn't present, it's most likely it was intended for stand alone release.
Incidentally, TDH member 'Metadude' has a small gallery of his deluxe. Including one shot of the interior with the plaque I referenced.
http://m1076.photobucket.com/albumview/albums/Rich_0111/Don%20Post%20Boba/1334920512.jpg.html?o=3