I've been drawing in a 5x8 Moleskine journal lately. And while I love the paper, I'm not real keen on the landscape format and it's amazing to me that Moleskine doesn't make this size journal in a portrait format with watercolor paper. I sent an email with this request to them 2 years ago and here is what they said:
"Dear Mr. Foster,Thank you very much for your mail and suggestions. We really appreciate the ideas of Moleskine's users. We will keep in mind your ideas for future updates.
Not very promising is it? If you have time and you want this as much as I do, please send in a request. They just might do it if enough people ask.