Cyclone III Dev-Kit Chassis

I don't think you can order anything like that. Usually, there isn't much in terms of protection.

For example, DE2-70 just have spacers on the bottom side, serving as feet and a flat acrilic cover on the top side, installed also using spacers.

http://www.terasic.com.tw/attachment/archive/226/image/de2-70_500_pic_en.jpg

Most kits are like this or even less protected.

Depending on what you want, you can either just buy longer spacers or you can have some flat acrilic covers made and fit them using spacers.

If that's not enough, you can buy a small box and fit the kit in the box using the spacers.