Wow, the waist on those is so narrow, I almost prefer them to the Wigmore. In fact I think I do. You can get bevelling on their MTO I believe, and you can get brass tack monogramming with AS which I've never seen GG do.
I assumed they'd be McNairy boots too:
Dug these up on End Clothing - http://www.endclothing.co.uk/mark-mcnairy-commando-sole-country-brogue-boot.html
These a pretty much them but with different laces - I'm sure I've seen the ones you've linked to somewhere, I'll PM you if it clicks.
I'm not familiar with any brands that doe double monk boots - perhaps some Jodhpur Boots? Like these from the Meermin thread? Not sure if MTO would fit into your price range but I believe they're releasing new styles soon so they might have some of a similar style within your range:
Good god that Brioni is repulsively expensive
Heading to a black tie event next week - several of my friends are wearing pre tied bows but taking proper ones in their pockets to sling round their necks later in the evening. I urged them to try tying their own but they seem to view it as a task comparable to cracking the enigma code...