>>11475353
If you see Prime Wars era toys at clearance prices online still, those are probably it. You might still want to get them anyway. That period's Vietnam factories were still starting out and had abysmal QC, meanwhile the KOs were made in China that effortlessly have better QC even with the trashiest of KOs, so they end up matching up.

>>11475375
Siege Cog was the last KO that fully copied the packaging including Hasbro trademarks. You can identify it from this one rectangular detail in pic. The original's asymmetrical