I wouldn't advise you buy a hop pillow, tamirra. After a very short time the hops will be 'dead'. Instead, make an insert for your own pillow:
2 or 3 handfuls of dried hop flowers
Additional herbs
Muslin
Make a muslin bag to fit inside a small pillowcase and fill
It loosely, so that it lies flat beside your regular pillow. With
The hops you can include dried lime flowers, dried, crumbled
Marjoram, and lemon balm.
You can of course grow your own hops, but if you prefer to buy there are plenty of places, such as this one, that sells online:
http://www.spiceworld.uk.com/product_info.php? products_id=2145