Not sure you will find anything that will match exactly. Might be just as easy to put clear in the two transoms and leave the fluted for privacy.

Here is a source for 3/4" reeded (fluted) glass: https://wgsonline.com/wg127-reeded-glass-4-x-4-sample.html

Here is another source, this one has 1". https://www.vandykes.com/restorers-1-inch-reeded-custom-decorative-architectural-glass/p/234562/s/12178009/?utm_source=google&utm_medium=cpc&utm_campaign=ppc_google_pla&gad_source=1&gclid=CjwKCAjw7-SvBhB6EiwAwYdCAUy1IuvnBsEbYzX9G7SRHXerJdO7XLCv3E5Qgx6bqb3sGZSz6P644BoC9C4QAvD_BwE

https://www.nathanallan.com/introducing-fluted-glass/

Is reeded the same as fluted? I was under the impression that reeded was concave and fluted (ribbed) is convex. The largest fluted I've been able to find is 1/2".

I am not sure about that but most of us here in California refer to the glass as "reeded" and just a guess but if they are different then reeded is probably less expensive because of wider use.

we are having the same issue alas with our entryway. we were told they dont make it in 1” inch anymore. the link for custom glass from vandykes is only one side fluted, flat on back. I’m so disapointed as it looks like we will need to replace both panels we have on each side of front door with modern to match. what did you end up doing? does anybody have any sources for vintage glass/salvage maybe sold in large panels?