Death. Takara makes blank molds that you can do whatever you want. However, I think you need a connection in Japan to grab those for you.
http://www.microforever.com/main.htm
This site can be hard to navigate. You prolly want Microforce 2003-2007. SmallJoes.com does NOT sell the buck models. But uh, Corey has a bunch at the $5 price point so... And believe me, there are figures I've seen on that Microman site that I'd LOVE to have. I have a couple others that are regular (ie; not magnetic). They are the ultimate in articulation albeit, fragile.
IF you want, I can showcase the other two i have. I sent a gnarly spider-like guy away but I kept a couple 'oldies'.