How do you get a rare moshling without a membership?

I am sorry I couldn't figure it out ? I also have a moshimonster account and I am not a member and I really want to find out how to get more then two moshlings ! If you have a moshimonster than Add my accounts their

*jasminep16194

*jasminep4438

*denice1221

and

*chatoangela

p.s.

SORRY :(