Mine never really needed breaking in. It was comfortable from the git-go. In fact, I'd had it for about a month before I ever bothered to wear padded shorts.

From what I understand, this is a bit unusual.

One of my friends had the same problem as your husband was with a brooks saddle. His favorite mechanic took a look at it and tightened it up. Problem solved.

It sounds like he's tried pretty much everything. Out of curiosity, how does he feel about his position on the bike otherwise? Sometimes what seems to be a saddle problem is actually a position problem.

The other thing is there is no "one" saddle for everyone, regardless of what the adverts say. I utterly hate gel and most anatomic saddles. But I know people that swear by both of them. I also know people who can't tolerate brooks.