We do currently have a field to override the domain used for snaps (the `ad` field in the bangs repository[1]) which doesn't have much validation and is useful for situations like this. It's possible we'll expose this for custom bangs in the future, but for now I can add that as a bang to the main repository, as it seems like it would be generally useful.

[1]: https://github.com/kagisearch/bangs?tab=readme-ov-file#bang-...