Solution to placing a mini-itx build inside a 2u short depth (20cm) rack?

I found a used mini-itx pc for cheap (i5 11500, 16gb, 256nvme) in a large ATX case with ATX power supply and four 2.5" ssd RAID

I want to install it in a 2u rack in a 19" standard width cabinet but with short depth 20cm.

Should I do any of the following:

- 3d Print a case and put it on a 19" rack shelf?

Possible but I would need to design it and print it myself

- Find mini-itx case + sfx psu and put it at the bottom of the cabinet

- Just keep it in the case and leave it on the floor besides the cabinet (Please no I have OCD, it needs to be tidy)

Keep in mind I live in a country with limited online ordering capacity, so I can't easily order something off amazon or Aliexpress.

I'm open to suggestions, Thanks!