it's been a couple years, but I found new "pop wagons" at Jin Kim's booth "JYK Allday" at Comic Con

https://www.facebook.com/jykallday/

https://www.instagram.com/jyk_allday/

https://www.jykallday.com/

I posted some from the 2021 Comic Con  https://justacarguy.blogspot.com/2021/11/one-of-coolest-things-i-found-at-comic.html