Any recommended approach to overriding the image pull requests for a custom registry?

[paulcjh]

Hey - I'm trying to create an integration in containerd for pulling images from a custom registry that implements a different pulling protocol for large containers.
Ideally I can create a plugin that gets used to pull the images instead of the default Transfers plugin in containerd, and ideally I do not recompile containerd as well.
Is there any example code or resources that might touch on any of these components? Any experience or guidance would be really appreciated! Cheers