Hmmm... I don't know a site, but if I were to make one, I'd start with taking measurements of the box style I wanted to cover. Cut the 5 pieces to construct the basic box shape (adding 1/2 seam allowance to all sides of each piece). Do the same thing for the contrasting fabric. Match the right sides together and sew the bottoms together, leaving a small part open for turning. Turn right side out. I suppose you could use a really long button hole with matching threads to create the tissue slit on top.

Or, rather than leaving a small opening in the base perimeter for turning right side out, how about cutting the slit for the tissue opening and turning through that opening? You could use bias tape to seal the edges of the tissue slit.

Actually, now that I've thought about it, this might be really cool to make. Maybe in a faux leather for my trendy brother for Christmas?

Any other ideas?

I'd do what needle_babe suggested, but use one rectangular piece of fabric for the sides and a separate piece for the top, then line it. Maybe finish the bottom edges with binding.

Cute idea. Don't forget to post pictures when you get it done.

There used to be a pattern floating around here that was a one piece (for the square box style) You sewed two side seams and the hem edge for the top...then used a draw string to gather it around the opening....Worked out real cute. It could be doubled and made reversible if we can find that pattern.

patti