There's no way that a baby can look like both of you because you would only be able to use the egg of one of you.
I suppose you could both get pregnant and then at least you would each have a child that shared some of your physical characteristics. Or, you could use a spem donor that looks similar to the non-egg-giving female.
Not very scientific but it's the best I could come up with!
You could both have a baby and use the same sperm donor so the babies would be half-siblings! But what you are asking is impossible other than, as previous posters have said, you use the brother of the non-biological mother to be the sperm donor.