Anyone have this PH4 rear aperture piece and lenses?

[Rick]

I am attempting to find the physical measurements of the original filters that could be bought as accessories for this eyepiece:







Asking because this optician can make lenses to fit that are either simply filters or providing eyesight corrections; just needs the dimensions of the originals and your optometrist's prescription if you want correction or even just a filter.

https://shootingsight.com/?product=custom-lens

Description
Any size single vision round lens from 1/4? to 2? diameter, in 1/4 diopter steps. Opthalmic quality polycarbonate with Anti-Reflective coating. Chamfered edges optional to fit in Knobloch type lens holders. Sphere, or cylinder lenses to correct for astigmatism. Lens powers can match a prescription, or be adjusted to optimize for shooting vision. Tinting is possible, at a slight upcharge.

Please note.. We will need the Sphere size, the Cylinder size and Diameter for your custom lens. We will also need to know whether the lens does or does not need to be changed per your prescription.

Cylindrical lenses for astigmatism need to be oriented based on your prescription. If you order a cylindrical lens, you will need to experiment with the lens orientation in the frame to achieve the correct orientation for you. Polycarbonate is impact resistant, however these lenses are not safety rated for impact, and should never be relied upon to provide eye protection while shooting.