Why can't I find a Proboost mbc?

I REALLY want to get an MBC (I NEEEEED 40+ more hp), and I keep searching the forums, and it seems that people have respect for Proboost (and they're only $18), but I can not find them. I try proboostmbc.com, I do a google search, but I am altogether unable to find them. Does anyone know of something I don't? Or should I just get a different type?

Anyone? Someone must have one!

they just kind of dissapeared. lots of negative feedback in ebay when it happened.