Can’t help with sourcing, but be aware that there are -good- bidets that come as a toilet seat replacement. You’d still need to mess with the water line and such, but it’s completely reversible if you move. That’s likely what you want, rather than a true portable option, since amongst other features the seat replacements will generally heat the water.
AI consumed the original paper, interpreted it as a single combined term, and regurgitated it for researchers too lazy to write their own papers.