I think the easiest way is to use Ali, or Ebay, to find a replacement. It will be any 22mm PVD / DLC buckle.
When choosing, pay attention that it is on a screw rod, not a springbar, and also branded.
Of course, it may not have an annual code on the back, or have a slightly different shade or PVD/DLC texture.
Also, you can refer to someone from TD. I haven't specified it for a long time, but chances are good that, for example, Puretime will have something to offer you.