Looking for cheap Powerbook Duo parts

Happy, Happy, Joy, Joy to all. I've been assembling some random Duo parts into working Duos, but I need a few more parts cheap. If you don't have parts, sources for cheap parts are also welcome. I need: a couple of 2.5" SCSI drives, any capacity install disks for MacOS 7.5.3 or 7.5.5 a couple of Duo keyboards a pair of Duo rubber side-inserts a few Duo RAM cards of any capacity OK, these Duos aren't 10 years old yet (closer to 5), but they're pretty cool, perhaps even Classic. I'm Mac-illiterate, but I've discovered that Apple somehow embedded product info at the board or ROM level. If I don't have MacOS running on one of these guys, is there a keyboard sequence that will show me this info? What sort of stuff is stored? Product id? Board rev? Serial number? Is there software that will dump this info in great detail? And, is there enough info in there to distinguish, say, prototypes from production runs? -- Doug