not cheaper but there are a few other optionsthere are a few wire stocks available from different vendorshttp://crosmods.com/stocks.htmlhttp://www.gmaccustomparts.com/epages/BT3197.sf/en_GB/?ObjectPath=/Shops/BT3197/Categories/CUSTOM_PARTS_FOR_THE_13XXtipman stock adaptershttp://mellonair.com/index.php?p=1_16_Stock-Adapters