Then, here is what I would do....
Go to McMaster.com and search for unthreaded nylon spacers, such as HERE. Someone needs to measure the width of the metal slot cut in the receiver to get the outer diameter of the 4 spacers you'd buy. Get ones that are a bit smaller than the slot width, and ideally measure that from an original. That will be the outer diameter. The length should be pretty easy to figure out from an original, or by eyeballing it. Then, the inner diameter needs to pass a M3 machine screw, with head on it that will trap the spacer in place. McMaster has lots of M3 screws, and our Ace hardware store has a fair selection of these nylon spacers and M3 screws to choose from.
Figure out the length of the 4 M3 screws you need, to include threading those into the drive deep enough. I'd also use some Locktite that can be broken loose later if needed on the 4 threaded holes in the drive.
Then I'd post how I did it, including pictures and part numbers, and forward that post to every moderator I could think of to have them show their HP contacts what some are being forced to go through on this issue.