there is an upcoming documentary Craft of Speed, looking for a distributor, which follows the Moon brand from its inception in the early 1950s to its current iteration. (thanks Marc B!)

"The hard part about this film was that it's an expansive story," says Craft of Speed director Ming Lai. "It's 30 years of Dean Moon's history. And then it's 30 years of Shige and Chico's taking over that important legacy. And if you wrap it together, it's really the history of hot rodding from then until now and what it's becoming now. It was a huge challenge to try to capture all this. The film is a little bit longer because of it, but I didn't want to shortchange history." 

 Lai spent four years filming Kodama and Suganuma and their friends and family at the shop, overseas, and at the Bonneville Salt Flats. The end result is both the automotive history of the brand and a close look at the lifelong friendship between Suganuma and Kodama.

https://www.caranddriver.com/news/a46619090/mooneyes-documentary-hot-rodding-details/

https://www.craftofspeed.com/