Well I agree--I couldn't find an AIO pattern I liked, that's why I made my own (out of newspaper). Basically I traced the happy heiny onto newspaper (stretching out the elastic) and cut one out of each microfleece and PUL. Stitched velcro loop strip on the outer PUL layer. Stitched the two layers together, made a casing for the leg elastic (this is by far the hardest part!). Stitched in elastic, turned the thing right sides out. Stitched back waist elastic in. Topstitched the whole thingy (to keep fleece from rolling out and wicking). Then stitched in velcro hook tabs and loop protector tabs. Voila! It did take me a few to really get the hang of them, but I've made about 20 for my son, some with the PUL sandwiched in between the fleece and a cute woven cotton fabric. His butt is unique!
Sleepy mom of two (DS-11, DD-8). 5 lost: 9/2004, 3/2005, 4/2013, 8/2014, ectopic- rupture @7w, lost right tube 11/14