Give these a try:
US: http://www.amazon.com/Mudder-Replacement-Adhesive-Screwdriver-Cleaning/dp/B010SC5TB4/
Canada: https://www.amazon.ca/Mudder-Replacement-Adhesive-Screwdriver-Cleaning/dp/B013BCJMFM/
Tutorial: https://www.youtube.com/watch?v=hcTczEUVAGM