Partik,
The card you are after is a PCI-I type part No. 503C2L074S and shoud work in in old Grey or Blue G3 Macs and OS 9 or a NuBus Interface board part No. 612B10015
Your ATTO card won't fit in an old Mac.
You'll also need the main power+communication cable that connects the back to the PS unit: 510K51164 (that's the one that looks like SCSI)
Then there's the PS unit for the back: 209A00010
The last version that supported the DCBII LIVE was
LeafCapture 7.0 but I think this only worked with the Leaf FilterWheel and the SinarCam I but I'm not sure about the Expolux ontroller.
Some of our dealers may still carry bits and pieces and maybe Thierry and Edwin can help with the Sinar bits.
You can try Photo Universal in Stuttgart, Germany ask for Peter Kleiber
p.kleiber@photouniversal.de +49.711.957.6012
Enjoy (or just trade it in for a new Aptus or whatever....)
Yair