I found this online machine shop where you can download their free software and quickly sketch up parts for machining. www.emachineshop.com
I’ve actually already bought my viewport material, so i’ll be doing mine by hand, but this method could save someone time. If the quality is ok.
Here is a k350 dimentioned viewport i sketched up on emachineshop.
Without the drilled and tapped holes, it comes out at $240 per port.
