I received a couple sets of these among the things I ordered (another story all by itself) from CDS. They fit my 1917 DWM with no problem aside from shaving a hair from inside the bottom notch, just ahead of the grip screw.
http://www.asamnet.de/%7Eehrenred/zu...iffschalen.jpg
60 Euros seems a fairly low/mid-range price. Adding expense of the export permit and a cut for my contact in Deutschland, plus shipping, brings them here for roughly $80. VoPo and those hideous, corrugated Russian grips also available.
http://www.asamnet.de/%7Eehrenred/zubehoer/gs.htm