Which type of caddy for the right tray (see picture)?

[iconfly]

There are caddys for the left tray (in red)

But I want also caddies for the right tray. The caddy for the left tray doesn't seem to fit into the right tray, however.

Any suggestions?  

missing caddy for the right tray

[DGroves · Accepted solution]

the right tray may not use rails, but the HP blue (or black)  HD drive spacers

https://www.ebay.com/itm/334064627573?hash=item4dc7cdaf75:g:Bg0AAOSwFu1gGwn-

https://www.amazon.com/LeFix-Isolation-Grommet-450712-001-Mounting/dp/B07PGNF975/ref=sr_1_5?dchild=1...

https://www.ebay.com/itm/384170025689?hash=item59725162d9:g:4kAAAOSwaVVgoo9-

[iconfly]

Thanks, that was it, for those who are interested how it looks like:

3.5'' bay needs to be slided in the right tray via screws