Where can I get the paint rollers, like the ones they use on HGTV?

The paint rollers look like they are the regular size in length but they aren't nearly as big around. I haven't seen them in any of the hardware stores I've been in. I don't know what they are called or I would Google them.Where can I get the paint rollers, like the ones they use on HGTV?
any hardware store or paint storeWhere can I get the paint rollers, like the ones they use on HGTV?
Try the 'As seen on TV' store if you live near a mall. They often carry those things that are advertised as 'not sold in stores'. I find lots of cool stuff there and sometimes it is cheaper than the TV price.