This wasn't super easy, as Laundry Sauce's fragrances are incredibly specific, but after some research, I found a reasonable option in Downy Infusions Sparkling Amber and Rose fabric softener ...

“Downy is the world’s number one fabric softener and we are excited to be ... fragrances and various sizes including the 20ml sachets, 500ml and one litre bottles. “We saw it fit to ensure ...