In case you haven't seen it on Corally's European web site, a TC 7075 aluminum replacement for the composite center diff support is available (link below). It was released in February 2022 but hasn't made it to the US yet. I got one a few months ago for my Radix6 off of the Corally Europe web site. The cost of the part is 34.95 Euros, and the shipping cost to the US is 21.50 Euros for 4-day DHL, which is the only way Corally ships to the US. It's best to combine an order for multiple parts as the shipping cost remains the same.
https://www.corally.com/New-Product...f-Bulkhead-Swiss-Made-7075-T6-Black-2-pc-Set/
https://www.corally.com/New-Product...f-Bulkhead-Swiss-Made-7075-T6-Black-2-pc-Set/