Is there a way possible to find a tribble from a star trek episode?

I really want to find a tribble from one of the star trek episodes and I don't know where to look. I want to find one but I have no clue to where to find one. I have looked at ebay and there was a tribble for 3,500 dollars and some low priced but they had no proof if they were real. Somebody Please help find one
A real prop from the tv show