Plus there are FPGA Amigas, but that is another matter.
There's also weird resistor or capacity pack somewhere that doesn't have a modern replacement.
You can get an entire Amiga as an FPGA, but that's a little different than a chip for chip replacement.
Can't tell how complete it is, but they are on a mission. :-D
Plus there are FPGA Amigas, but that is another matter.