For a Sanding Block that Fits Perfectly, Use Auto-Body Filler - FineWoodworking
How To Make The Ultimate Sanding Block - IBUILDIT.CA
Dura-Gold Pro Series Adjustable Radius Flex Longboard Hand Sanding File Block with Both Hook & Loop Backing and PSA Backing Conversion Adapter Pad, Use Continuous Rolls or Sandpaper Sheets, Auto, Wood -
Dura-Gold 20-Piece Contoured Profile 5" Hand Sanding Block Set with 40 Sheet Hook & Loop Sandpaper Kit - Interchangeable Assorted Convex & Concave Shapes - Sand Wood Woodworking Furniture, Auto Paint - Amazon.com
How to make Sanding blocks for any profile. - YouTube