I've made many of these. They were never factory. There was once upon a time a 914 gauge, but that's not really what I've assembled.
I start with a stock fuel gauge and stock 911 temp and pressure gauges. I make a faceplate with windows for the idiot lights and the faces of the fuel-temp-pressure.
I use the standard VDO lights and light tubes so they look like they could be stock VDO gauges.
I like them and still have some plates left over from when I had more time. They tend to be on the pricey side so they don't sell well, and donor gauges seem to keep going up in price. There are many options including rotated numbers, no numbers, etc. I've done some that had different temp ranges and different pressure ranges. Never knew there were so many versions of the 911 temp and pressure gauges.
Here is an example without silver center and with just the standard faces of the 911 donor gauge used.
Click to view attachmentI doubt I will have time to make a gauge until fall 2022.