Hi [NAME],   The mechanical part for fPERC to the R350 chassis should be 5Y1HD. And the cable to the PCIe is HJ8MT.
I purchased the 755 fperc (3KDWX) and now need the part numbers for the chassis  the card sits in and the cable that connects it to the PCIe slot on the motherboard of my R350.
Part numbers for the PCIe to 755 fperc cable and the sled that the 755 fperc 
sits in.