One of my brothers had a similar problem with his 1927 Chrysler 62. It is very hard to find parts for these cars but eventually he found salvage yards and dealers through registers and clubs and people who have cars of the same vintage. You may want to look up the
ads for Dodge parts in Hemmings magazine and contact each and every dealer who offers parts for cars of that vintage. Ask them also if they can make suggestions for where to find these parts if they don't have them.