As promised here are some links to websites that sell inks and rollers.
Major Brushes sell basic cutting tools, the vinyl tiles you were working on and basic rollers. They also sell the waterbased ink that I showed you, but you didn’t use these.
If you wanted to try litho ink that we used you can buy it from Intaglio Printmaker. As I said it is far more expensive. They also sell waterbased inks for relief printing. I have no experience of these so can’t recommend any to you.
Hope this is helpful, will post photos soon! Mail me if you need any more help!