http://www.azuilleann.org/ - I would enquire there.
Some observations about “dry climate” reeds, as someone who lives in the Southwestern USA.
We play mostly indoors, not outdoors. Indoor climates are controlled.
There are three spring, summer, and fall indoor climates:
Air Conditioned - cool and dry, with low humidity. In Arizona, this is most common.
Evaporative Cooling - which results in easy 30% - 40% humidity inside the structure. There is a LOT of this.
No climate control, which is not so common in Arizona, especially in Summer. The outdoor environment in Arizona is NOT always hot and dry. For example, this summer we have a pronounced monsoon, rainy season, and summer afternoons can be cooler and downright torrid. I don’t know how many play their instruments outside as a rule. Not many. Humidity is just all over the place.
Winters get quite cold, perhaps even below freezing, and we all heat, so warm and dry conditions inside structures prevail.
So you can see there is a lot of humidity variance. A piper here must learn to adjust their reeds.
That said, I get reeds regularly from the North of Ireland, that perform just fine. But they do need adjustment. with aperture needs changing quickly with the relative humidity of the environment where you are playing. Constantly dinking with your reeds, from day to day, often results in inadvertent damage to the reed when opening and closing. So we seem to go through a lot of reeds, and are forever fiddling.
When Mick O’Brien did a workshop in Santa Fe, he had a humidifier set up. His reeds did fine, and the rest of ours went sideways in the small room.
David Daye has a dry climate reed. Those need to be adjusted a lot too, but seem to be a bit more hardy, maybe because of his stressing them prior to shipping, and he uses a harder cane.
In New Mexico, my most stable reeds are those made with cane grown locally.
The pipers here with the least success are the ones that seem unwilling to dive into adjusting their reeds to meet current conditions.
So anyway, it’s more complicated that it seems.