I have an HP 1000 A900 20-slot box with a working 4 card CPU set (sequencer, data path, cache control, memory controller). I also have a 12990-60102 A990 CPU card that would replace the 4 A900 CPU cards and install in place of the A900 memory controller card. What I don't have is the 12990-60020 jumper board that would install in the A900 backplane instead of the A900 sequencer, data path, and cache control cards, nor a 12230-60001, 12230-60002, 12230-60003, or 12230-60004 memory frontplane to connect the A990 CPU to one or more memory array cards. I'm not very hopeful, but is there any chance anyone on the list happens to have a spare HP 1000 A990 12990-60020 jumper board, and/or a 12230-60001, 12230-60002, 12230-60003, or 12230-60004 memory frontplane that they would be willing to part with? Not expecting these for free. These might be parts that 360 Technologies had before they recently closed up shop, although if they did they probably expected business critical prices for them. (For reference, the HP Museum site has a copy of the HP 1000 A990 Upgrade (HP 12990C) Installation and Service Manual, 12990-90011).