Dvorak on the GRE

Hi!  My name is Colin, and I type with a Dvorak Standard Keyboard. 
I've been using Dvorak exclusively for almost a year now, and life has
been all peaches-and-cream ever since I switched from the qwertyboard.

I just signed up to take the GRE, a standardized test for people who
want to apply to grad schools.  I'm paying ETS (who make the test) and
Prometric (who run the test) $140 to take a four-hour test--they
should be able to provide we with at least an alternate keyboard
layout (if not an alternate keyboard altogether), right? 
Unfortunately I haven't found any information about getting anything
but qwerty on their websites, and it doesn't seem as though they are
very open to keyboard diversity.  I know they don't allow
graphite-on-dead-tree essays, so my chances of getting a DSK for the
written section look pretty slim.

I'm hoping that some of you out there might be able to help me out. 
Have any of you taken the GRE and been able to get anything other than
a standard qwertyboard for the writing section?  Would filing a
disabilities claim get me a DSK for the test?  (Are any of you doctors
willing give me a note stating that I have RSI and require a DSK for
testing?)  

If any of you have success stories or know of workarounds for getting
a Dvorak keyboard for the GRE's writing section, I would really love
to hear them.  I don't want to spend the next month regressing onto
qwerty just so I can type proficiently when I take a silly little
exam... and not to mention the pain of trying finding an affordable
qwertyboard that isn't awful to type on!  Please help me!  Any and all
advice is welcome!

-Colin