I had a nice conversation with one of my good friends from japan that is a huge keshi (rubber figure) collector about these Masters of the Universe figures and he said that they are just Prototypes that were supposed to be released by Mattel and Bandai (Ma-Ba), but for some reason they didn't get to be released. There are only a few known of each figure, so thats why not many know about them and that there isnt any packaging for them.
Good to know, but that sucks cause who knows when more will ever be available.
My friend has the other 5 I need so im gonna try to work something out to borrow his to cast up as well to get a full set. (but we can leave that for the future)
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here are some more pics ive came across over the years