PowerPC CPUs are still produced, mainly for embedded applications, e.g. the Qorivva MPC55xx MCUs.
As far as I'm aware, the only currently-produced (for some value of "produced") desktop computers using PowerPC processors are Amiga replacements: ACube Systems' AmigaOne 500 and A-EON Technology's AmigaOne X5000. Nowadays on the desktop it's pretty much all Intel/AMD, with a sprinkling of ARM.
The Power architecture lives on in IBM's POWER CPUs, the current iteration of which is the POWER9; but they're only available in (expensive, but very, very fast) servers and workstations (such as the Talos II and, of course, a number of IBM servers).
You should be able to find lots of PowerPC-based Apple computers second-hand, capable of running your discs (assuming the operating system is compatible).
If your disc images are for Macintosh-style computers, you could try running them with QEMU's PowerPC emulator. For more direct Mac OS on PowerPC emulation, you could also try PearPC or SheepShaver.