I have been searching for a similar product since learning of this neat little trick at a Billie Lauder paper piecing workshop. I think the trimmer/shaver Billie used looked something like this...
eyebrow trimmer. It worked great for tight stitches like the ones used in paper piecing, or machine embroidery. I don't remember the one in the class being battery powered, but it must have been. Billie, who lives in California, told the class that this all came about because of the girls that completely shave their eyebrows off and pencil in new ones! Got her to thinking! It works great...I was her guinea pig on a boo boo of mine!