It's not actually THE Inu Yasha outfit, but it's the same pattern for the fuedal japanese suit.... it even tells you how to make it to your EXACT size!!! So just use the red cloth and and black thread... and viola!!!
The following link is for the main fuedal Japan clothing... armor.. etc... go to the chapter 16 called "Underneath it all" it has the right stuff for Inu Yasha's clothes!
This is also a good one for ARMOR too!!!
Make me Inu Yasha!