Julie Bell did the work on B3,TMIL & the singles released from it.
She also did the artwork for HCTB
Julie & her husband Boris Vallejo are regarded as possibly the finest fantasy/scifi artists of their era.
Amongst Julie's work is the design & artwork for the modern series of Spiderman films & many of the comics.
Their website is
http://www.imaginistix.com/
Where you can find in their store & gallery both prints & genuine paintings done by both of them, all of them be it genuine or print come hand signed & numbered with a certificate of authenticity.