I have an older Hasselblad flash grip with Stroboframe arm that puts the flash
over the lens and the origonal Hasselblad bright screen the Opto-Fiber screen
for sale.
The Hasselblad grip shows wear but still works great on a 500c/m, it is $45.00
with free shipping in the US and the plain ground glass Opto-Fiber screen is
$35.00 with free shipping.

Here is a link for a photo of the grip:
http://members.aol.com/dkfletcher/hbbracket.jpg