you can buy the video at this site
http://www.diana.dti.ne.jp/~vfactory/INDEX/FL1.html

you can also download volume 6 of Futokuma here:

http://rapidshare.com/files/11439880/FUTOKUMA_6.part01.rar
http://rapidshare.com/files/11447196/FUTOKUMA_6.part02.rar
http://rapidshare.com/files/11529640/FUTOKUMA_6.part03.rar
http://rapidshare.com/files/11453613/FUTOKUMA_6.part04.rar
http://rapidshare.com/files/11459258/FUTOKUMA_6.part05.rar
http://rapidshare.com/files/11463585/FUTOKUMA_6.part06.rar
http://rapidshare.com/files/11467700/FUTOKUMA_6.part07.rar
http://rapidshare.com/files/11471614/FUTOKUMA_6.part08.rar
http://rapidshare.com/files/11539449/FUTOKUMA_6.part09.rar
http://rapidshare.com/files/11549127/FUTOKUMA_6.part10.rar
http://rapidshare.com/files/11472855/FUTOKUMA_6.part11.rar

Enjoy the links