The 1XX series have alot of plastic/usability issues because of plastic. So I can see why the demand isnt so hot. 

But.. the powerbook Duos seem to be built slightly better, and could benefit from it. 

If it was mine, i would run an SD card extension ribbon, and tack the SD card inside the battery compartment, stick it on the sidewall. So you can still use a battery. But you remove the battery and remove the SD card to change/update files.