What you want is an Ebow, which are fairly expensive for what they do. Ebows create a somewhat-violin type of sound by vibrating the strings. They're kind of cool, but they're more of a novelty than anything.

As for the violin bow, I'd stop using that on your guitar. Violin bows are obviously not meant for guitar and they will get ruined very fast...trust me, I know. Some bows can be quite expensive to replace too.