Profpointy
Legendary Member
Must be a way of making your own - how about piece of plywood, cut to desired size, cleat screwed to it, piece of coarse wet and dry glued on for grip?
Or screw a cleat to a piece of alumnium - and screw in some grub screws by way of grip.
Quite why he needs crowd-sourcing when any small metal shop could knock these out cheap if bough in reasonable quanity.