After several hours of digging, I finally found my JB HIAWATHA cars, set #3. Here is my first crack at posting some photos of the four car consist. From the rear to the front the cars include: CEDAR RAPIDS observation car, SOUIX FALLS parlor car, DINER car, and RED RIVER VALLEY coach car.
The craftsmanship and finish on these cars is unmatched by anything I have seen on any other Standard Gauge cars except other Jerry Brown sets.
If anyone knows who has Jerry Brown Hiawatha sets #1 and #2, please let me know!
I can take and post more photos if there is any interest. Just let me know what you would like to have me shoot.