[Eliot Ness]

Unfortunately we've entered a dark period for grille cloth. Kenny Richmond is slowly starting to have some made but it is a slow/expensive process and so far he only has two patterns and they are both Zenith.

The best you can hope to do is find something close until something better turns up. There is some cloth being sold on eBay, and while it isn't reproduction, some of it is better than nothing.
Here are a couple of vendors:

http://www.ebay.com/sch/brets-old-radios/m.html

http://www.ebay.com/sch/q-masters/m.html...7675.l2562

There is a site in Italy that sells grille cloth, and some of it appears to be stock he still has leftover from grillecloth.com. It isn't cheap, but I know a collector in Columbus who bought a piece from him and was pleased with it. The fellow apparently speaks English and will answer e-mails about his prices:

http://digilander.libero.it/oldradios/engver/index.html

The only other thing you could do is run some classified ads looking for some. There are collectors who have some packed away from panic buying when the announcement came out that it was being discontinued.

If you need to know what pattern #40 looked like here is a site that still has the pattern pictured, although it is a little small:

http://www.grillecloth.com/grillcloth/generic.php