My younger sister is 20 years old and has developmental disabilities. She wears adult diapers and uses wheelchair, so it's hard for my parents' to find clothes for her that are comfortable, fit well, and are age appropriate. I bought some really nice dark stretch denim on sale at JoAnn's last week, and I'd love to make her some cool looking "jeans" for Christmas. They don't have to actually be styled like regular jeans, but I'd love for them to be a little more stylish than the sweatpants that she usually wears. I've looked at most of the major pattern companies' websites and they don't seem to have anything with an elastic waist that's not PJ pants.
The things I'm looking for (either in a pattern, or to adapt a pattern to accomodate) are: would fit a 4'10", 115 pound young adult, roomy enough to accommodate an adult diaper, elastic or drawstring waist, works with medium-weight, 1-way stretch dark denim.
I'd love suggestions for patterns, tutorials, or ideas on how to adapt not-quite-perfect patterns.