If you look at the fenders for the sedan & touring they have an extra piece of sheetmetal to block off the open side at the rear inboard area. The others don't need that. If your doing custom anyway. you may be able to add the flat sheet metal block off areas to keep road crud off the bustle in the back. That's the major difference with a possible difference in the supports underneath. The front ones will likely work. You may have to try a set of T aprons to see if they can be made to fit. If not then try some Model A aprons. You will have to wing it on the running board supports after you mock it up. Model A supports might work. The front fender supports for a T are different than the model A so you might try some T supports first.
The guy using the A fenders still used coupe types on the back but getting fenders in the UK would be more difficult than it is here in the states. The A stuff would fit right on the frame so it solved his problems with less work. He abbreviated the rear fenders to make them look better to his taste. You can see that they are wider than T types and makes them look a bit oversized.
Fiberglass fenders are available but with no brace. Here is an example of a 26/27 sedan or touring rear fender.
https://www.ebay.com/itm/233089054932