We are very interesting getting Motif for Linux.
The Motif that was used to port GRASS to Linux was from Metro Link:
Metro Link Incorporated
2213 West McNab Road
Pompano Beach, Florida USA
33069
Telephone number (305) 970-7353
FAX (305) 970-7351
Internet - sales@metrolink.com
I have contacted them via email and they are very quick to respond.
Good luck.
Pat McClanahan Internet:mcclanah@dlgeo.cr.usgs.gov
EROS Data Center mcclanah@edcserver1.cr.usgs.gov
Sioux Falls, SD
605-336-4601