The soft plastic gasket that sealed the connection from the mill to the collection bucket had deteriorated in long-term storage, and since this grain mill is no longer made, and this non-standard part is impossible to find, I made a replacement.
The fit is not perfect, but it stays in the mill pretty well.
I printed it using 3DPrintingCanada TPU, with 1 perimeter, 0.72mm line width, and 10% gyroid infill. This seemed to give it enough flexibility to fit snugly.
The author marked this model as their own original creation.