Tube cage help

Hello,

I am thinking of getting a Bottlehead paramour, but little children like to touch things that glow. Where can I find a suitable tube cages to fit dimensions of 7.25x11.25x5 inches (height of the tubes from base plate). I was only able to find something by Hammond measuring 10x6x5.2 inches. It looks ok and is just big enough, but Id like to choose from several options instead of only having one to pick from.

I searched google for about an hour. Any suggestions for what other key words I could use? I used "tube, cage, enclosure, wire basket, electronic component, supply, vacuum" in various combinations.

Thanks,