https://www.createspace.com/Products/Index.jsp
you can try createspace as well, amazons service.
You can make a pdf and sell it for the kindle and even make a paperback.
It is print on demnad and they take their cut for printing etc from each purchase so there isn't any overhead.
They have wizards etc to make the book covers or if you know graphic design you can do a custom upload.
You just upload the word file, alogn with the back/front cover and your good to go.