I have a SCSI2SD that lets you set the serial # of each virtual SCSI device. I'll try to see if I can find the serials stored on floppy and set my SCSI2SD drive to that number.
In the meantime, a kind member of the forums as provided me with [k] copies of Deck II 2.1.2 and 2.2.2 (both by OSC before the sale to Macromedia). I have a Powermac 7500 with PCI Audiomedia III, and I think Deck wants to see Nubus devices before it will launch. Deck II 2.5 works fine on the PCI Audiomedia III, so I'll be using that for the moment.