Fabriconnection.com has good prices, but doesn't always have everything in stock. One Stop Diaper Shop is closed at the moment (last I checked) - also excellent prices, prompt shipping, good service. Terri at FMBG sells hemp also.
Hemp is heavy, too. If you buy less than 3 yards it's not really worth it once you pay shipping. I get all mine through coops... Well, I did until I bought a big roll and haven't needed to buy any for a while now. :LOL
Hemp jersey is just like tshirt fabric, only hemp and a little sturdier than a reg. cotton shirt. Hemp fleece is like cotton sweatshirt fleece. It has a fuzzy/nubby side, and a smooth, or jersey, side. Hemp french terry is hemp fleece, but the nubby side hasn't been brushed so it's flat loops on that side.
SOO your smooth hemp diapers could be the jersey side of french terry or fleece. Diapers I know of that are hemp jersey (unless I'm way off?) fireflies, KHW, Crickett's.
I've always gotten mine through co-ops, but when I need some soon, and can't wait for the sometimes REALLY long co-op timeframe, I get it from www.wildnwoolygoods.com. They also have an Ebay store where the prices are lower than their store. I usually add about $1/yd for shipping.