mini rack in 19 inch adapter rails

Has anyone made 1U plates that could go in a 6U space in a 19 inch rack to provide 10U of mini rack (at 90degrees orientation)?

I have a mini rack, but it is not nearly as protected for travelling as my various 19 inch flight cases, which have secure covers on both sides (e.g. [https://a.co/d/gvjIA9H](6u 19 inch case)

A pair of plates with standard rack holes could be put in the top and bottom U's of this and then I could turn the case on its side and have 10U of mini rack in a very portable, secure case.

Of course, they would also allow you to put half-rack devices on edge in any 6U+ 19 inch rack, as well.

If not, I may have to see about making some!