All right, so i had to think about it and finally decided that the Ceccotti will get to live its life as a chunky, regular old carbon gravel bike, not as the slickest bike ever. We need a replacement, and i have to say thanks to all who have contributed with input so far, it did help with the decision.
How about oil slick titanium? 
https://www.aliexpress.us/item/3256808102380457.html
How in all hells did you find this? None of my searches have showed these frames. Image searching with this shows up a few alternatives, and likewise, another alternative i have seriously been considering did also show up to have a little store on AliEx, namely XACD.
https://www.ti-bikes.com/titanium-bike-frame/titanium-road-bike-frame/titanium-road-bike-frame-flat-mount.htmlMilling about and checking their references for a bit, it seems like this frame would be a legit solution for this build. And it looks bonkers!

Also, my build just became three times more expensive. But we've gone too far now to not do it, haha.
Currently in contact with XACD to figure out details on the frame and order. Let's see how this goes.
In the meantime, i'm still recieving random oil slick parts from previous orders, so it's all just trickling along. Pics of stuff (and i guess of the eventually finished Ceccotti) are coming along in here while we wait for the titanium frame to get sorted out.