To summarize, it appears that my power supply was replaced by Dell Part Number: YFG1C.  So firmware updates for the legacy power supply are not available.  I picked up two of these YFG1C supplies cheaply online and will see how my T610 likes them going forward. Thanks Dell for all the help here.
[I posted this message on Monday, but it appears to have disappeared from the forums for some reason, shrug.] I have a Power Edge T610 with a single 870W power supply (Dell Part Number PT1641).  I appear to be suffering from this issue Power Supply Error on Dell R710 The issue being errors reported with temporary communication failures with the power supply.  My power supply appears to have firmware version 03.02.50, which is indicated as having this bug. My question is where can I download the firmware update for this power supply?  I have tried the following: 1) The Dell support website for my service tag lists a firmware update for the wrong power supply. 2) I attempted to update the firmware via the Lifecycle controller, but after downloading the catalog and verifying it, the LC reports that no updates are available. Thank you.
Seeking Firmware update for T610 Power Supply PT1641