
Aigle Boots have been becoming popular in recent years. I have no experience with them, so I can only type what I can see by their description.
They aren't real leather. They have two different types that could be suitable for trooping.
Start-$129.99
They say there are 6 different calf sizes. But looking at them I don't think they go very very big for a super wide calf. But take a gander at their sizing chart and find out your measurements.
The other model is the Ecuyer. It retails at $189.99 (though I often see them selling for $169-179).
Maybe they can work with you. Aigle Boots