Hi Mark, The play in the door hinges is caused by worn "acorns" which are small acorn shaped items between the top and bottom hinges.
There are various shaped acorns, some are curved top & bottom and some are curved at one end and tapered at the other end.
Normally the pin (bolt) does not wear. You can get replacement ones from Paul Beck / Vintage Car Parts https://www.vintagecarparts.co.uk/parts ... -and-balls
You may need to "fettle" them to fit correctly.