I didn’t recall having any problems ordering the diverter
off eBay, except the one I ordered came from the UK. I just trimmed the corners with a hack saw to friction fit inside the seat, then added a little foam weatherstripping to help hold it in place and cut down the seat shifting slightly. I’d like to find a better fitting pee container but this one works ok for now. I use peat moss since I already had a bag for garden use.
And to respond to Glenn's comment, in all the years of using disposable diapers on my three sons, there was no health code or legal requirement to dispose of the solid contents separately from the diaper. It all went in the trash and to the landfill.
Updates and improvements to LilScamper here
“When one tugs at a single thing in nature, he finds it attached to the rest of the world.” ― John Muir