Hi, I'm looking for a Mulberry messenger bag. I want it to be as practical as possible since I'm gonna use it in school and such. I also think a zipper is required. I like this messenger but I can't find it on their site and I don't know the price and I don't think it has a zipper (do any of the mulberry messenger bags have zippers?). Any recommendations? Thanks a lot! By the way, is it possible to change the strap to a leather one?