UPDATE: Please find fusion 360 file below to edit and adjust as you which, this was an unfinished prototype so perhaps you can make it better.
Low profile clamps that can work with either T tracks or 6mm nut inserts that you see in common cnc waste boards.
They require 2 pins 6.3 OD ~35mm long for the toe part to slide along.
1 M5 x 25mm allen key bolt and nut is required.
The bolt that secures the clamp base to the waste board is up to you but it will fit up to M6.
Print in any material you like although i would perhaps suggest something like ABS although my first few are still going strong in basic PLA.
0.15 resolution quality profile in slicer 6 perimeters 7 top and bottom layers.
Print time for one was around 2h 45m using apron 22.32 g of PLA filament.
The author hasn't provided the model origin yet.