I found a site this past summer that produced shutters with glass,ie.reeded,frosted,etc, inserts, but apparently did not bookmark it.
I need help finding this site again. The site allowed you to pick color, glass type, knob preference, and buy online.

I was looking for replacement inserts for my bathroom shutter and found the following website. Not sure if it is the one you want.

www.signatureshutters.com