Hello!
Do you need it to be truly vintage-style, retro-looking? Because if not, I have something that is even good quality and driveability-wise - the Gesslein F10. A high-quality, functional, and sturdy pram, but in a more modern look - the only thing making him a little bit retro would be those four large, fixed wheels.
From the real retro-style prams, I would suggest looking at the Inglesina Magnum - a pram with a seat convertible to a lay-flat almost-carrycot. Even shaped like a carrycot, I don't find it as comfortable as a real one, so use with a soft insert bag would be better in this case. And you don't have to store any separate carrycot as well... So this could be what you're looking for.