ijji:  Sold for a limited time during the Gunbound Back to School Event.  From August 23rd - September 5th, 2007 you could purchase this item from the Gunbound event page for 30 G Coin.

Softnyx:  Available for a limited time from December 9th, 2008 - January 6th, 2009, during the 2008 Gunbound Christmas Event. (***Also known as the: "Hey guys lets sell almost every single rare avatar for cash event!!".)  This item(s) could be purchased for 2,000 cash in the Gunbound Avatar Shop.