That was my thing before the custom dolls, and a store called Kay Be used to sell them 4 for $10, and I hit a store in Hollywood that had a bag full they didn't know what to do with. I have the full set of Micro Machine ones too.
OMG Cirque I remember when those came out - I wanted them soooooooooooooooooooooo bad. I only have one though- a dear friend of mine found out that Chekov was my favorite character and bought me the Chekov doll! He stand with my other sci-fi guy dolls on my shelf and occassionally teases my Momokos