non-standard agraffe size

[Matt]

Hi all:

I have a client who owns a Nakamichi grand about 10 yrs old or so.  I need 
to replace a broken agraffe.  Upon removing the broken stem, I found that 
it is larger than the two standard sizes: .273" in diameter (just about 
7mm).  Does anybody know of a source for this part?  I read on the internet 
(so it must be true) that nakamichi rights are now owned by Young Chang, 
but they haven't really been very helpful.

-Matt