Homtelium still owns one of the Guardians in his inactivity.
The Teta/Tetan/Supremacy was from an individual red scenario that took place near the end of 2003, transitioning in to 2004. It closed just as Darkness was officially released. To my knowledge it was the last small red scenario. The wrecks in question were recovered from the system which contained the infamous Death Star moon, aka X-110. I went there with the intention of salvaging the various wrecks, but had to choose between the unknown ancient wreck and some smaller pieces. I took inspiration from one wreck the Imperial Core had salvaged there during From the Ashes, which later turned out to be the Imperial Escort Carrier.
About the Hardcells: I am not 100% certain, but I think people are confusing several events here. From the Ashes 2, a sequal galaxy-wide scenario that died in its infancy, was a seperate event from the "community games" that Jesfa talks about.
I believe the Hardcells were perhaps from the "Black Fleet Crisis" *admin* scenarios of summer 2005. They were still viewable, though locked, at the bottom of the RPG centre board up until a year or two ago. Similar to red scenarios, but with no chance of death, just asset loss/gain. There were 4-6 seperate scenarios that would eventually join in to a final battle, but I believe most never finished the first stage. The one I took place in, set on Adumar, was completed though. The first of various other prequel tech came from these scenarios as prizes: the ARC-170, Droid Tri fighter, and maybe the Mankvim Interceptor.
Some others like the Toscan, Belbullab and at least a few of the CR-92rs came from Redbat's community games on IRC though.