Welcome HarveyH, and Skrain to the Forum and Huckster Future Owners. I built my own Body as You have Researched using White Oak, and a 1930 Sedan Cowl. It was a fun build, being that my Occupation was a Building Contractor, it was a easy build. I used the old Hudson Wagon Works Plans that Jay has bought the rights to. I used local cut White Oak. air dried and Planned it myself. A local Saw Mill will have the full 2" that you will need in some places, Total lumber costs was approximately $300 for the completed Body.
Rear bumper was no problem, I used the Sedan 2 piece rear bumper and built a frame out of 1 1/2 angle iron that attached to the main runners under the Body. If you build it your self you gain self satisfaction. If you do use a Lentville body, Have them run the grain of the wood on the Doors Horizontal, instead of Vertical. The sides of the Body runs the Grain of the Wood Horizontal, and the Doors should also, just looks out of place and wrong to Me? Good luck it what ever your choice is. I transported mine to Florida, myself in the rear of a 16 ft. Budget rental truck Nov. 16th last Year, and Drove it 1,750 miles until May 1st. Click on the Photo Below or go to My Profile for More Build Photos.
Here are some of the Finished Car and some Florida Photos.