I'd try a huge sphere of polyamide aerogel, wrapped in an aluminum shell, then evacuated. If that didn't work, I'd give up immediately, because vacuum lifters

I'd try a huge sphere of polyamide aerogel, wrapped in an aluminum shell, then evacuated. If that didn't work, I'd give up immediately, because vacuum lifters are stupidly difficult when hydrogen exists. Okay, I wouldn't give up immediately. I'd also try a vacuum onion, with multiple layers of aerogel and aluminum, with each successive layer evacuated to a different pressure.