Get a Model M (or other decent keyboard), pop 'em
off and reshuffle.
The letter keys are generally interchangeable, the only problem would
be a cheap keyboard that won't let them go gracefully.
Fopr some keyboards (although not the type M), the letter keys are
different depending on which row they are supposed to be in. The HP
HP-HIL keyboards (HP46020/HP46021 I think) are like this, as I found out
the hard way when trying to converet a German to an English one...
-tony