I would contact Stan Uher in Blenheim Ont who is the world expert on Dort / Gray Dort. Lots of hits for Stan in search. 519-676-2391 email stanuher@hotmail.com
Stan has a 1915 Gray Dort and owns Classic Coachworks.
Classic Coachworks
160 Marlborough North
Blenheim, ON N0P 1A0, Canada
Phone: (519) 676-2432
https://ca.linkedin.com/in/uher-stan-38a3488b
Where Are You From? Ottawa Ont
Do You own a car built by Durant? 1932 Dominion built 614 Sedan