A U.S. based company named At The Front makes some high end replica's of the M1923 cartridge belt and pretty much every other piece of U.S. web gear.. One of their recent offerings was a two toned version using a mixture of Kahki and OD green webbing. They list the mixed color stuff as 'transitional' items. Suitable for the 1943-44 timeframe. I use their stuff for reenactments and don't even take my real gear out for display anymore. It's well made, and they use a lot of NOS buckles,snaps and even material.
This belt looks a whole lot like the ones they were selling last year.