Hello, David:
Clearly, all of us "feel your pain." I know I do, because I have a W-250
that is my favorite machine. I haven't seen this many responses to any
question
posted on this list in a very long time.
The bottom line is that if you do some searching, you should be able to
match the grille-cloth material very closely, and install it in a way that will
match the original appearance of your machine quite well. No, it won't be
"original" ever again, but you will be repairing a very old, and marvelous
machine, one that has survived for a very long time. With some effort, I am
sure
you can preserve it in a way that will allow your W-250 to be appreciated by
those who will follow us as caretakers of these wonderful contraptions.
Randy