Well, I searched, (and spent about 2 hours reading interesting threads -- you guys and girls rock!) but Haven't found out if adult sized diapers like these:
Cloth Pocket Green All In One Diapers Animal Diaper Covers Inserts Cloth Training Pants
Amazon.com: Thirsties Duo Wrap, Meadow, Size Two 18-40 lbs: Baby
exist in adult form.
Now, I have found a product that is shaped and fitted, with snaps, that resemble these. But really, I'm looking for the baby style with velcro straps. I've seen them in certain *ahem* Japanese videos... does anyone know if they can be had by mere mortals?
-Edit again. As CuteGaachan points out, LuvsGurl has a lovely diaper cover. While I plan to get a few to use with disposables, I would love to find a full overnight diaper in the same style.
-Edit again, again-- I was sent to here : http://www.babykins.com/adult-cloth-diapers.html I'm going to try the velcro youth large and report here once I try them.