This isn't the first time Anstead has built a 158 replica. He previously used parts from an MG donor car to build a 158 for his Master Mechanic series, which was featured on F1 Geeks.
https://www.thedrive.com/news/38410/the-tipo-184-kit-transforms-your-miata-into-a-30s-style-grand-prix-racer-for-less-than-11000
Here is a picture of the new kit and frame.
