We had our pair harness made in Ontario, and the owner, Abner, goes and visits Yonnies to get ideas for his harness. Weāve had it for a few years and really like it. It has held up well and is very similar to a Yonnies harness (we have a single Yonnies and love it as well).
He makes several colours (green included!) but is Amish and does not respond to emails or facebook, though he does have a FB page that a friend takes care of. Check out Custom Driving Harnesses (or Countryside Harness Abner Brubacher). The Canadian dollar will go a lot further for you Americans as well! His prices are lower than Yonnies and the quality is the same/similar.
Weāve also had a Zilco pair harness for our 13h pair, but like the Countryside one better.