TombowSuwanee, GABrand · Paper goodsMONO Knock Eraser Refill$2.80 – $4.25Stocked at 9Stocked in CA, MO, OH +4PUSH/PULLSeattle, WABrand · Retailer · Gallery$2.80SunSnow: Paper & GoodsSt. Louis, MORetailer · Stationery shop$3.25Penny PostAlexandria, VARetailer · Stationery shop$4