An eps file could be alot of things. Im guessing that the eps your talking about is a raster image? In this case, there is no easy solution. You are going to need to trace it illustrator yourself, or send the file to a professional to do it for you.
eps files can be either vector or raster. Like Jon mentioned they are probable raster. If they are simple one color images you should be able to trace them to vector. If they are intense graphics you might need to use the image as a template and using the pen tools, recreate the design by tracing.
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