My friend Brian gives away a do-it-yourself NAS machine every year. We weren't all that pleased with the way his 1U PSU fit in the U-NAS NSC-800 case. It would be just fine around the house, but we weren't happy that it would be flopping around during shipping.
I designed a quick bracket to keep the power supply from moving vertically, so it ought to survive shipping now!
This is a customizable part, so you should be able to make it fit other situations.
For another project involving the UNAS case, Brian needed fit a pair of SSDs and a fairly large 10 gigabit Ethernet card. The UNAS SSD brackets didn't leave much room for that, so I added a pair of mounts to our existing PSU spacer bracket.
The model with the SSD mounts is slightly different than what we actually used in Brian's case. I eliminated most of the unnecessary support between the two SSD mounts, so you should be able to spin it around 180 degrees, if you'd prefer.