The Kiki and Lala items are obtained from a special amiibo RV that is a crossover with Sanrio. The character with the RV is ?toile.
I have ?toile's amiibo card, and I scan in my RV's for people to visit most days. I already scanned a different RV today, but if you keep an eye on my thread, you might be able to request ?toile's RV another day, or visit it if someone else has requested it that day.
You'll need MEOW coupons to order things from RV's, so if you don't have many yet, you can work on saving some up if you'd like to visit my campground sometime.