Not sure about this, but might be worth a look.
Addonics Product: Sapphire 5-Slot CF Drive.
The cheapest 128GB CF card I could find is the Komputer Bay card, although I am not sure I would trust this.
That would make a 640GB Raid 0 for about $853.
I think for that kind of money, I would rather have the Promise J2.
OTEK TV LLC 