Sorry for bringing this up after so many months but today I came across this:
http://duga.jp/ppv/transclub-0023/
http://duga.jp/ppv/transclub-0036/
http://duga.jp/ppv/transclub-0048/
I know the site is in Japanese but here are some tutorials:
http://japorntube.com/duga/howtobuy.php...