I had no luck tracking down a Brownnoize Productions Throne of Chaos. But, with a whole bunch of polystyrene and spare time, who needs one? I only used what I styrene I had; namely 1mm and 0.005" thick flat sheet as well as 13/16" tube. It's all held together with modelling cement and weld, nothing fancy. A big goal of this project was to get some beginner's experience with the weld. I had no initial intention of painting this project, but with all the grey putty and spilled glue, I'll likely give it a once over with primer just to get it looking uniform. The 0.005" thick sheet came in handy not just for detailing, but also to build up little raisers to accommodate the sculpted detailing on the outside of Unicron's feet.
Nice. I'm using the 3D printable one by spradlinb on Thingiverse. Definitely nice being able to sit him upright