Amazon.com : Rapid 23/15mm Strong Staples, for Stapling 80-120 Sheets, Use with Heavy Duty Staplers, Galvanised Wire, Box of 1000, 24870200 : Office Products
Bostitch Premium Heavy Duty Staples, 0.63" Leg Length, 1000/Box (SB355/8-1M) | Staples
WORKPRO Heavy Duty T50 Staples and Brad Nails Combo Kit, 1/2" (12mm), 3/8" (10mm), 9/16" (15mm), Total 7500 Counts - Walmart.com
Nails & Staples for Nailers, Staple Guns & Pinners |CSL Tools
1000 6mm X 15mm staples for German quality PARKSIDE electric stapler LIDL PET PAT new steel - AliExpress
Source Fine wire 23/15 heavy duty office staples on m.alibaba.com