I’ve been saddle searching for what seems like an eternity. Generally if I stick what I want into Google, all of the sources come up. It’ll list a bunch of saddles. Some exactly what I’m after and some close to.
I don’t know if there are different models within the Vega line. I’ve owned several Amerigo saddles, but not Vega.
You could check The Saddle Bank in the UK or you’re open to ordering from overseas.
Otherwise Fineline tack, Highline tack, Equestrian Imports, Galloping Grape, Pelham Saddlery, Aiken Tack Exchange, Maryland tack exchange, Happy Horse tack shop, Good Apple Equine Consignment, are all used saddle shops that I’ve bought/sold from or otherwise dealt with/browsed.
Also search Facebook. There is atleast one Amerigo specific group on there too.
Sometimes it’s just patience. That specific configuration might not be out there at this very minute.