We may build an automated HEPA filter making machine in house.
This is a knife style pleating machine. This one can make filters in any thickness between 5-100mm. It's likely expensive AF so we'll have to build it ourself.
Another options is a rotary style pleating machine. Unlike the knife style, you can't change some numbers in the software to change the thickness- you have to replace the rollers. I'm looking into possibly making it configurable.