That Nismo S-tune kit is also shown on the JDM site. Not sure how much better it will be because I can't read the Japanese PDF, but it doesn't look anywhere near as beefy as the Tein kit.
Here are a couple pics of the sway bar links brackets a friend made for me. Powder coated finish, 1/4'' steel. They are designed to put the link end in the same position as stock, relative to the strut bolts. Will let you all know how it works out...
EDIT: Longer bolts. Stock bolts are long enough to accommodate the thick Tein mounts (stock mounts are thin stamped steel) but with the extra bracket, it is close to running out of thread.
EDIT: re post pic of stock set up.