Sewing day means sometimes that something is broken.
The fault was not big but caused troubles in action.
That's why I took the broken part off...
... and yes I found matching one.
I had to release the strap a bit...
... to fasten the unbroken recycled buckle.
From the result it is possible to see -when pictured like this- that the buckles are not identical. But no one notices it in use.