There is a new version of the datasheet posted on the ecatthenewfire.com website.
It includes additional data covering the new E-Cat NGU generators that are now available for pre-order. According to the data provided, the new generators are housed in 3 mm thick white plexiglass containers. The power density ranges from 0.5 kW/kg (which costs $2500) for the 1 kW generator to 0.91 kW/kg for the 10 kW version ($25000).
https://ecatthenewfire.com/wp-content/uploads/2024/12/E-Cat-Power-NGU-DataSheet-2024-12-3.pdf
E-Cat Power NGU DataSheet 2024-12-3