My goal was to reproduce this hotel with materials from my yard. http://www.terrevivante.org/237-construire-un-hotel-a-inscetes.htm
In addition to the bumble bee box and holes drilled in wood, I also needed some other tubular structures that bees might like to nest in. Many designs use bamboo poles for this. After a trip to Lowe's to supplement my existing inventory, I cut the poles into 5.5" lengths. This corresponds to the width of the shelving I was using as part of the structure.
The lacewing house became the biggest challenge. Everything I could find said to use corrugated cardboard rolled into a cylinder. Just a few years ago, this would not have been a problem. Trouble is that cardboard has been completely replaced by bubble wrap. Even my shipping department husband couldn't score me any type of cardboard that I could easily roll.
I decided to go ahead and try the bubble wrap. I worry that it will not have the right air circulation, but it's worth the experiment. I rolled a layer of newspaper with it to try to emulate cardboard - we'll see if that works.