JamesGood morning, James.
I can't say whether there is a "wonder girl" out there or not. What you're dreaming of is an idealized version of what you would like to find - or rather, what you think you would like. The dreams are most likely happening because you're not satisfied in your current relationship. The reasons for this are not clear from your message, so I can't comment upon them.
"Dream girls" are, by and large, fantasy constructs. There's nothing wrong with a fantasy, but when it becomes an obsession then you place yourself in danger of losing out on what your real relationships have to offer. You might want to take a long look at what you do have, and try to determine what's missing from it that is so important to you. If possible, try communication first.