No one has done any commercially, so far as I know. The correct fabric has to be made, for starters, if one wants to do it right. It's complicated. Also, there does not seem to be a shortage of original belts that I know of. I see plenty at Knob Creek, for example. But there may be no mainline vendor you can go to, it's more a gun show thing. They are on e-Bay and/or gunbroker from time to time as well.
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