Zuburbia which is all about vintage finds.
This vintage 1980s Louis Vuitton diaper bag is available at the Enokiworld website for $795. It features the signature Louis Vuitton monogram leather outside and the inside is lined in vinyl to protect the bag from bottle and sippy cup spills. It measures 14.25" wide by 12" high by 6.5" deep with double 7.5" handles.
The only catch is that you are stuck with a monogram with the initals RCP but I'm sure you can get it easily replaced or I guess the weird monogram makes it even more fun and vintage. I actually like it as just a normal carry-all purse too, perfect for the plane and carrying a laptop.
But if you still want the Louis Vuitton name but want a new one, it will cost you a cool $1800 and looks a little different from 30 years ago. The Monogram Mini Lin Diaper Bag comes in three colors and measures 17.7" x 11.8" x 6.7". Its design is more practical for the modern mom with adjustable flat handles, a removable padded shoulder strap, a key ring holder, tons of compartments and two outside pockets for baby bottles. Available at Louis Vuitton stores.