The extent of what I know is that someone 'local' to where I am was breeding these motleys and would wholesale the non-keepers to local pet stores and other people, which is why there was one year when like... 3 or 4 people showed up here asking "what's my morph" and they were leopard mots.
Leopard patterning has shown up in motley clutches that do not come from this lineage. Notably, a friend hatched out a baby with a section of leopard from a clutch that produced both pinstripe AND banded snakes, leading to my current pet hypothesis that it is simultaneous expression of those two presentations of motley.
I am pairing my anery leopard motley to my ultramel charcoal motley next year. She has neither banding nor pinstripe, so I do not know how the pattern will be affected, but the entire clutch should be a mix of normal and anery motleys het charcoal and het amel OR ultra.
I got my leopard from a guy who bought him at a local shop but was moving to australia and couldn't take his snake with him. Imagine my shock/glee when I saw I was getting a very high quality (but also very fat) leopard motley for free.