Cheesemaking in Basque-country
Wow, I just came across this, I dont know if you're still interested but I do have some experience with this.
About two years ago I was there and wanted to meet and talk to cheesemakers there. I really should've done more research prior to going but ending up in san sebastian was a bit last minute.
It helps if you speak Spanish and really really helps if you speak Basque. If its just English you may not have much luck. But anyways, I used this list:
I just started calling everyone on that list and asking if I could visit their operation. Most of these are farmstead/small operations and its super interesting. I ended up working for a day with one of them and the experience was awesome and invaluable.
I dont know if there is something organized however google may have something for you. Good luck sorry for posting so late.