The pictures from 2007 show the development platform.
Jens and Oliver used it back then to reverse engeneer the custom chips. While doing this, they mixed Clone-A chips and Amiga chips to make sure, they work EXACTLY the same as the original chips.
There was a talk at Breakpoint 2007 of Jens describing how they did it.
=> there you go: https://www.scene.org/file.php?file=...d.avi&fileinfo
He also says, that they won't offer replacement chips, because they would be WAY more expensive than the original ones. Clone-A will be fittet into a big, single FPGA. Some BGA monster I suppose.