If you're looking for an iMac that is compatible with macOS 9.2, you'll need to consider models that were released around the time macOS 9.2 was available. The last version of macOS that supports PowerPC-based Macs, including those compatible with macOS 9.2, is Mac OS X 10.5 Leopard.
One option could be an iMac G5 (PowerPC) model, which was released in the mid-2000s. Another option might be an early Intel-based iMac, as some of these models were released while PowerPC-based systems were still being supported through "Rosetta" emulation.
It's worth noting that finding a brand-new iMac with these specifications could be quite challenging, as Apple has moved on to Intel and later ARM-based processors for their newer machines. You might need to consider purchasing a used or refurbished iMac that meets your compatibility requirements.
Additionally, keep in mind that running such an old version of macOS might have security and compatibility limitations, so it's essential to consider the potential risks and limitations when using outdated software.