I can really emphasize with couples in this situation. Not only would I love to help, I need help myself.
I have been with my husband for 12 years. I am 31 and he is 29. We are very down to earth. We have a great family, but no children of our own. After many years and no pregnancy, I decided to have a fertility work-up done, fearing there was something wrong. To my surprise, my husband have a extreamly low sperm count. Our RE gave us two options. We could use donor sperm or have IVF.
What I would really like to do is be a Gs for an IP and myself. I would carry the embryo of the IP and one of my own. I know that this situations is not for all, but I am very serious. If you would like to explore with me the possibilities, please contact me.