Buy one. They work great.
I have one but i'm not sure who makes it. Its not the one thats like 4" long and looks like a huge tongue depresser. I have the one thats shorter and wider, fits into your palm more. I got it for my Shadow because the 1" bars were making my hands go numb (lots of vibration from the v-twin added with the cobra drag pipes, it vibrates like crazy).
Works pretty darn good. I just rest my palm on it on the highway and loosen my grip on the handlebars. Takes away the numbness rather well. I am thinking on getting one for the left side too so i can loosen up on the grip on that side as well.
I recommend this style :
Its very comfortable and you forget its even there after awhile.