Tom's StudioFrome, United KingdomBrand · Paper goodsField Mouse - Spare Ink Reservoirs$2.80 – $3.50Stocked at 3The Paper CanopyCharleston, SCRetailer · Stationery shop$3.50Slackline PressBranford, CTRetailer · Stationery shop$3Dear OllieLansing, MIRetailer · Stationery shop$2.80