From their announcement:
Hoard O'Bits is happy to announce that it is now the exclusive seller of the new Last Stand Convertables bits packs. Last Stand's first three bits pack offerings are Steam Powered Wings ($5.99), Gears ($2.99), and Steam Powered Back Packs ($3.99). Each set is perfect for converting 28 mm or 30 mm figures with a steampunk feel. Their items are made in black, injection molded plastic.