There are some other options, although I know in your heart how much you would like to birth a child of your own. Would you consider being a foster parent? It might give your husband a chance to at least reconsider his stance on having a new baby around the house. I'm not sure how permanent fostering is, but maybe it would let you both get your feet wet. Sometimes foster parents are needed until the birth parents are ready to assume responsibility again.
If your husband is still unwilling to consider any options, I strongly encourage you to go to counseling. Hopefully this will allow you to learn some coping strategies in terms of the tremendous grief surrounding your loss and maybe allow you to deal with stressors in your marriage.
I have a parent who is not in the best health. This parent has been sick for most of my life, so I've always tried to prepare myself. But, I can imagine how empty and scary my life would be without this person. I don't know that I will be able to cope at all. I imagine the worst. I can even feel the grief although this person is still with me. Therapists call this "Anticipitory Grief". I can only imagine what it must be like for you. My heart truly goes out to you.
I'm wishing you the best.
"Patience is a waste of time"