The question about who will support your husband when YOU are going through this is an important one. I agree that in my experience partners deal with our diagnosis in different ways. Like you, my husband has a stressful and high powered job. He couldn't be there for me when i was first diagnosed and that really made things difficult for him - especially since he watched his step mother die of the exact same type, grade and stage of breast cancer that I had only 5 years before. Once he could be by my side, he was a rock. It's only just recently after over 12 months of treatment that he has opened up about how much my diagnosis and treatment has affected him. In fact his NEW Year's resolution is to be more honest about his feelings. My husband bided his time, but now he feels like it is his turn to let his emotions out. And now I really welcome it. It's a bit of a delayed reaction and I am not sure how we could have coped with us letting our emotions and fears out at the same time earlier on but now we have enough energy to deal with it. SO, I understand your worry about hubby, but it may not come to the forefront for some time yet. My advice is to be patient and to listen and he may let you know what he needs probably someway down the track.
My thoughts are with you
Nadine