Deane, there is a company in California called Blue Heron. They have made custom bags for me for double kneck gusitars. The guy has a rasdio show and is big in the Bluegrass Music field.
Google them. The quality is superb. You just measure the instrument and choose the materials.
Russ
[This message has been edited by captain Russ (edited 05-08-2009).]