http://www.akiba-online.com/threads/pic-clip-erika-erika.1127851/page-5
There are three sets I haven't downloaded until the links were invalid:
st2_natsusyoujyo1_erika02.zip
st2_natsusyoujyo1_erika04.zip
st2_natsusyoujyo2_erika01.zip
Would you please upload the three sets on "filecloud.cc"...