just wanted to follow up with this....
first, i gave up trying to find a replacement for the wire pass-thru hole grommets below the fan wall. the shape is a bit unusual and the sheet metal is folded over to make a smooth edge there anyway. the only disadvantage, albeit i think a small one, is that it allows air to back flow if there's enough pressure in the rear; but that's unlikely with the rear fans pulling air out the back.
I was however, seriously needing the rubber mounts around the screws with shoulders that hold the dual 2.5" HDD/SSD mounting bracket once I was shown a solution to use it with my extra-wide X9DR3-LN4F+ (
Supermicro 846 chassis boot drive options with X9 motherboard) and the fan wall. I took some measurements and then went hunting for something that might work. After some trial and errors, I think I found something that worked:
Here they are installed on the bracket:
I'm actually very happy with this. The tiny grommets for the bottom of the bracket fit better than the original ones. I measured the size of the studs on the floor of the chassis and tried to find something that fit well and these were just that. The original rubber piece seemed a little too large, but still worked. I'm really happy with the rubber piece for the shoulder screws at the top of the bracket; that one was hard to find as it required a square shoulder and since that is the same screw that holds the fan carrier bracket to the fan wall, I'm pretty sure (haven't tested yet) I can use the same part for that too.
Here are the dimensions:
lower grommet:
Diameter=1/4"
Inner Diameter=0.100"
Outer Diameter=21/64"
Thickness=0.061"
upper grommet for shoulder screws:
Diameter=1/4"
Inner Diameter=3/16"
Outer Diameter=0.386"
Thickness=0.2"
Square shoulder
In the end, I may have spent just as much as buying a new bracket that would have come with new rubber mounts since i had to buy some of these things in bulk. But, at least now I'm not held hostage to buying the entire dual 2.5" HDD/SDD mounting kit whenever these mounts go bad, and I also can use them for the fan wall (which Supermicro suggested I get a new chassis!) as well! I've also got a life-time supply of these things now!LOL