This is the CRT I used. I got it off Etsy, however the listing is sold out as of now. This is the base that I used. I used Velcro to attach it to the TV.
The CRT I'm using is an Action 5" Black and White TV Model - ACN-3518
The Base that everything sits on is from a robotics kit I got a while back it's a fairly common base you could probably find on amazon. I provided a picture as well.