I believe the picture was drawn by this artist:
http://www.k5.dion.ne.jp/~wings-z/gallery-0.html
They have a bunch of Bleach artwork up, however I think the mature content can only be accessed by password. At the very bottom of the page there is a red dot and when you click it you're send to the page with the required password. Unfortunately it's all in Japanese so I can't read it. The question is here:
☆ それでは、問題です。
兄様がお召しになられている襟巻きは、名のある織師の手による逸品ですが 、
銘を 『 ××××紗 』 と、云います。
××××部分を、半角英数で ご入力下さい。 → 
The white dot is where you put the password. I've had this site in my favorites for years, so if you know Japanese or know someone who can translate this and share the password I would be eternally grateful
