Where to buy a bent-metal-cube-shaped printhead-like part? What's it called?

[swift sable]

Hello, I'm failing to find the outer part of printheads. Surely, there must be spare part sellers? I want a metal enclosure for a bit of stuff in a milling project, a printhead-box would be fitting for that...
Thank you for any help (if any) (europe)

[vague hearth]

I'm not entirely sure you can buy those because they come specific for each printhead

At one point I was looking for a replacement one for an Anycubic printer and couldn't find a place to buy one, just the whole printhead