This method works with the Fujitsu D2607, too. I just needed to use the H200 SBR instead of an empty SBR. That allowd me to flash the DELL IT firmware to the D2607. And the rest ist just the same as you described it.
By the way, you can probably unbrick your D2607 by using a motherboard that allows the disabling of loading option rom at the boot process for the PCIe slot the card is connected to.