Long (Tencel) Shorts??

I'm looking for something rather specific for Victorian summer - long shorts. So they sit just below the knee, I had a pair of Tencel long shorts in the 90's and I just loved them so much. Preferably they have a zipper and buttons, pockets and then and extra 'cargo' type pocket on the outside. They MUST be 100% cotton, but if i can find Tencel that would be like a special xmas gift to myself! Anyone have any ideas please and thank you :)