Here is the ShtokCustomWorx ECO NPXL V1 PCB Lens Cover. This is the lens diffusion cover for the LONG PCB holders. Both in 1″ and 7/8″ OD.

Machined from acrylic. It is not compatible with any third party PCB holder. It is for the 7 pin ECO NPXL V1 PCBs.

Note that the holder is press fit in.