https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
This is my latest one. Not that all my others have died, I am just addicted to buying the darn things! Has a clip that I haven't managed to break, good battery life, separate volume control (which is important to me) and sounds good for books. I don't know about variable speed though, I'll see if I can dig it out tomorrow and check for you if you would like.
S