We also have be diagnoised with azoo. Ours is slightly different as DH had a vasectomy before i met him. We had it reversed and had a DD who is now two years old.....One year ago we started trying for no2 and after me saying to DH there was something wrong I finally got him to see a FS and he has scar tissue formed so we have an obstructive azoo.
We were referred to a Male fetility specilist who did a biopsy on DH (as the others have discussed) and said they found 'plenty' of sperm so we have them in the freezer awaiting our first attempt at ICSI hopfully at the end of this month early next month.
I would certaintly try and get into a FS asap....its taken us over 8mths to get to this place so its a long process....
Also let your hubby know that my DH's biopsy wasnt particularly painful...he walked out of the procedure and we even went out for lunch straight afterwards.