A new cash shop item has been added to sGE - Hron's Treasure Trove (Grace Edition), available during 16-30 July 2009. It is a box which drops a random item and costs 1,500 G-Points.
Among the possible drops are Milky Bob Hair, White Vent Costume, Bistre Costume, Crystal Shotgun (AR30), and Crystal Shooter (AR30)... all usable by Grace Bernelli. The new items are Milky Bob and Crystal Shotgun. All others have been released previously.
The problem is, as usual, the drop rate. Some "rare" drops include Lv.92 Enchantment Chip x1 (WOW~!), Soul Crystal x3, etc. "Common" drops include Hermes Potion x20, Town Return Sheet x20, Lucky Pouch (EXP +20%) x5, etc.
Some statements from Kaioujin...
It looks like all the other unreleased stuffs (Elemental Bracelet, Elite Magnum, Black Cat Band, White Santa Costume, etc. See v3.4 Patch Notes.) will be released in the near future in these treasure troves. That is one thing I hate about sGE. It is pay-and-pay-and-pay-and-pay, and then after selling your ass off to pay for them, you still might end up with a bunch of crap without those in-game pixels that you wanted.
Now for some noteworthy comments I found in the forums...
Edit: For a larger sample, see HTT (Grace): Loot Results for a player's loot after opening 50 boxes. Only 2/50 are Grace-related items.