Here is an original early slat grill speedometer for your WW2 jeep. It will need to be restored and I will be happy to pass along the name of an excellent restoration shop that can get it done. What you see is what you get.
This is not cheep but these are getting very hard to find now. The item "Orig Early Slat Grill Willys MB Jeep Speedometer Speedo Ford GPW Long Needle" is in sale since Tuesday, June 8, 2021. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Gauges". The seller is "jeepgeek27" and is located in Modesto, California.This item can be shipped worldwide.