This will probably be moved to the anime costume forum, but...
Folkwear sells patterns for hakama and kimono, which would require just a little bit of modification (the kimono) since the sleeves and underarms are different, as well as the length (Ichigo's is only to his knees or so, not a full kimono).
Folkwear's asian pattern page: http://www.folkwear.com/asian.html
Also, check out Anne Liese's site. It has diagrams, which might help you, although some people find it confusing. I'm currently working on a tutorial for the tops; it's my "quick and dirty" method, but it might be a start. I won't have it finished for at least a week, though.
Anne Liese's site: http://fibers.destinyslobster.com/Ja...es/japmake.htm
Searching thru the Bleach thread suggested above might find something for you as well. The search button is near the page numbers.