I have used this as a starting point
https://rivetcycleworks.com/which-saddle-is-right-for-me/
substitute the Brooks saddle dimensions *found and then narrow down your options.
As I recover the Brooks saddle frames, I can then reshape the cantle plate, just as was done decades ago.
https://www.classiclightweights.co.uk/classic_components/brooks-saddles-blocking-and-butchering/
I tend to make them in the Swallow style and this is very comfortable for me.
https://rivetcycleworks.com/which-saddle-is-right-for-me/
substitute the Brooks saddle dimensions *found and then narrow down your options.
As I recover the Brooks saddle frames, I can then reshape the cantle plate, just as was done decades ago.
https://www.classiclightweights.co.uk/classic_components/brooks-saddles-blocking-and-butchering/
I tend to make them in the Swallow style and this is very comfortable for me.