Check out Allen Edmonds ... they make a good model (longbranch?) And if you can get seconds or a sale you may be happy.
The top of the line English "country dress boot" maker is Tricker's. The OP's boots look a lot like Tricker's, but just a little more affordable. There are other great makers who offer a more "dress-dress boot" version (sharper toe, less chunky sole, no storm well) like Alfred Sargent, Peel, and on up the ladder ...
Thank you kindly, Doc. I always keep your thoughts in very high regards.