start here
http://www.assistancedogsinternational.org/
use the search link to find Service Dog programs
apply to programs that seem like a good fit for your husband
take into consideration that the wait lists are very long (2-5 years on average)
and that most agencies expect you to find a way to help cover the cost of training your dog.. either through your own personal investment or through your doing fund-raising activities
Training a Service Dog can cost $10,000 - $50,000 (seeing eye dog training take a very long time & is more expensive)
I am not trying to be discouraging... I am just giving you an idea of what to expect
Remie (my SD) is owner/team trained. Properly certified trainers were involved in evaluation & training. I had extensive dog & horse training but did not trust myself to (1) know enough about SD training as I had never done it (2) be honest if I was faced with washing him out --- his training cost me @ $28,000 spread out over 2002, 2003, & 2004. I am not counting the cost of food or vetting. I am not including the on-going cost of his care or the cost to re-cert regularly (have qualified evaluator determine he is good for public use)... which I am not required to do, but I can assure it because of the hostilities/discrimination we have faced as a SD team it became necessary
one of the HUGE disadvantages to owner-training is that a very small percentage of dogs are "bomb-proof" for the purpose of working in-public..... you can spend all the time in the world, do the right research, buy an immaculately well-bred pup of working service dog stock & things be going wonderfully well when out of the blue between ages 6 months - 18 months something happens & the puppy is no longer "bomb-proof"
if you ever decide to owner-train you must also factor in what you are going to do with the dog if your investment goes down the drain...... do you keep them as a pet? do you re-home them?
I do realize you are not considering owner-training at this time
but that is usually the next thought when people apply to programs (or find programs not open for application at that time) & then find out years wait
since it is usually the next thought... I felt it important to bring this up
One of the better PTSD service dog trainers in the country (who specializes in training support for owner-trained teams) is Marcia Adams of Tinker's Dream
http://petsforpatriots.org/partners/tinkers-dream/
I am not sure if she is still training. She moved her newfie rescue from CO to AK. I use her LinkedIn to contact her