I am just trying to figure what pins I need to order and where to get them from for door hinges on 1927 tudor / coupe doors.
One of the old ones that I have looks to be a 1/4" pin and most of the suppliers stock a 7/16" pin for the touring / roadster hinges but that is going to be too small.
any suggestions greatfully accepted
You might have that backwards or did you mean 3/16? Most of the door pins sold are in the 1/4" or there abouts size, open or closed cars. Check Snyder's online catalog in the Model A section, there are a few more choices.
https://www.modeltford.com/pl.aspx?t=s&v=hinge&page=1 From Lang's
Door hinge pins, 7/32" diameter by 2-1/4" long, can be shortened to fit various body styles