It is hard to imagine making a major investiment without trying out the instrument....no doubt Mr. Catspaw builds a nobel instrument and I would purchase one from him if I were in the neighborhood (and in the market) however, here is another list.

Jim Fyhrie, I have heard play over a dozen times. He is a musician, an artist, and an honest craftsman.
Plectrum Recording
Jim Fyhrie
2795 Laguna Canyon Rd.
Laguna Beach Ca. 92651
Ph 714-494-7478 jfdulcimer@aol.com

The others are from a newgroup listing.

Builder Business Location
------- -------- -------- Debbie Suran In the Tradition Deer Isle, ME
Jerry Smith Song of the Wood Black Mountain, NC
Russell Cook Wood N' Strings Arlington, TX
(N/A) Folk Mote Music Santa Barbara, CA
Rick Fogel Whamdiddle Dulcimers Seattle, WA
David Marks Folkcraft Instruments Winsted, CT
(N/A) Music Folk, Inc. St. Louis, MO
(N/A) The Dulcimer Factory Fredericksburg, TX
Jim Fyhrie Plectrum Dulcimer Co. Laguna Beach, CA
Bob Tack R.L. Tack Dulcimer Co. Delton, MI
James Jones (I don't know) Bedford, VA