Alcohol Ink Set - Vibrant Colors High Concentrated Alcohol-Based Ink, Concentrated Epoxy Resin Paint Colour Dye Great for Resin Petri Dish, Coaster, Painting (10ml Each)

This is on the US Amazon, but I've used this brand. It's fairly cheap and worked just fine - the multiple reds might allow you to tweak the tint you want. I'd say you're probably fine just getting any brand though. https://a.co/d/08e7L2qL