Dell Poweredge T310 Non-Redundant Power Supply, Upgrade to Redundant Problem...

We have a Dell Poweredge T310 with non redundant power supply. We located parts for redundant power supplies and the power distribution board.

The problem is, there is a T-shaped bar like this that we cannot find a part number for, anyone talking about it on forums, no one else who tried similar upgrades. In fact, when I chatted with a Dell rep he was rude, but most importantly, I think he might have wrongly insisted that the chassis between a redundant and non-redundant body were completely different and in fact unswappable from purchase time.

This seems to be untrue (though please tell me if I am wrong) because in the chassis I have (T310, non-redundant) there is a specific place and latches to lock in the power distribution board, and the latches for the redundant power supplies to lock in on the case body interior. I just want to know if I can locate that T Bar looking thing to complete the picture. Any T310 experts or Dell pros who can help me out? Can I actually NOT upgrade to redundant power supplies? I really would like to be able to obviously!