I got it off Amazon. I got some Modge Podge to seal over them after. I made a few using HTV as well (different design) and the wood took it really well. It didn’t like the Cricut brand pens at all though, bled like crazy, ended up using a fine point sharpie and it was a lot better.
WWYICHEN 3.5 Inch 20 Pieces Round... https://www.amazon.com/dp/B07HNLJN37?ref=ppx_pop_mob_ap_share