Several pieces of Bob Peak artwork for ST:TMP are on sale/exhibit at Gallery Nucleus in Alhambra, CA. Pretty pricey, though!
http://www.gallerynucleus.com/gallery/exhibition/194
Unused poster concept: http://www.gallerynucleus.com/detail/7712
First version of final key art: http://www.gallerynucleus.com/detail/7737
Alternate design: http://www.gallerynucleus.com/detail/7731
http://www.gallerynucleus.com/gallery/exhibition/194
Unused poster concept: http://www.gallerynucleus.com/detail/7712
First version of final key art: http://www.gallerynucleus.com/detail/7737
Alternate design: http://www.gallerynucleus.com/detail/7731
Golly! those art pieces are amazing