I hope you've found a pattern you like!!! I remember trying to find a pattern for a PLAIN cardigan to make for my mom earlier this year and it was tough!!!
I ended up buying a Paton's Next Steps booklet all about cardigans and used a pattern from there!! Here's a link for it:
http://store.knitting-warehouse.com/303954.html
And it has sizes from XS up to 5XL.
Happy knitting!!!!!
knitcindy