Recovering OS/8 Device Handlers

All this talk about RL01/02s and RK05s has reminded me that it would be nice to get the device handler for my dual Xebec hard sector floppy drives connected to my -8/M. I have only a couple of bootable disks with a couple of versions of OS/8. A lot of them are corrupted from best I can tell. I've developed a way to dump all of the readable blocks from disk over the serial port, which, as you can imagine, does take a while. I've also developed a little program that can parse the data into RIM format to be disassembled. be located within blocks 16 through 25, octal. Should I be attempting to dump those blocks and try to reverse engineer it that way, or is there a way in OS/8 to directly dump each individual handler? Any tips would be much appreciated. Thanks, Kyle