You'd probably need to go with a local tailor or find someone who specializes in japanese clothing. Maybe this one?
http://www.ebay.com/itm/Custom-Made-To-Order-Kimono-Or-Hakama-Shita-Gi-Samurai-/130138216142?pt=LH_DefaultDomain_0&hash=item1e4cd796ce#ht_500wt_1081Trying to match stylized anime with historical clothing is going to be difficult, since Inuyasha's hakama (pants) are gathered at the bottom and a traditional hakama is not:
(samurai on the right)
The 'puffed' appearance is a result of the suneate (greaves) pulling the hakama against the lower legs:
and
If you want to fake the gathered look, you could have the hem rolled and a tie sewn in to pull it in.
Also, a proper kimono goes to the ankles, and they are primarily worn by women, tucked into their hakama. If you're trying to go for the Inuyasha look, you probably want to look for a 'gi' - that's the shorter jacket style, which is popular and easy to find since it's a common eastern martial arts item. This place has some:
http://www.sakuramartialarts.com/Martial_Arts_Uniforms_Karate_Gi_Dobak_Keikogi_Dogi_Gis_s/20.htmKendo has white/red/black hakama, however, red is a harder color to find for a gi so your choices will be limited.
Don't know if that helps much, I'm much more of a samurai armor guy than just clothing, so the only clothing bits I know are mostly related to armor...
