I'm too cheap to spring for a super rare M.U.S.C.L.E. Blackhole Sunshine, so I went for the Five Star sofubi version. It's huge, flesh colored and has some fun articulation. All for less than 1/10th of what the little guy would set you back.
I'm pretty sure both were Japan only releases...I know the yellow one was. One per household limit. They're from Five Star in Japan. Needed a lot of help to get one.
The flesh and yellow painted are available through Grumble. http://www.grumbletoy.com/store/index.php?main_page=index&cPath=75_110