I've always used Tri-State Ins. for my old trucks. Tri-State is now part of the Continental Western Group (
www.cwgins.com ) in Des Moines. My '40 1/2-ton is $91/year. Anything over $5000 in value they will want pictures of for their file. The coverage is excellent and even includes spare parts up to $500. Many of my friends in the midwest here use them also and have been very happy with them.