I have fitted one to a Dell Inspiron N17R i5 2410 Laptop, fitted exactly the same as the drive that came out (Although it was a major strip down job to do it!). I understand that some older Laptops had a thicker 2.5" drive, so may need a spacer with the later thinner 2.5" drives.
HI short reply is no i have not done so into a dell but cant see why you would need a rubber mounting.. it is a solid state (no moving parts) HD so?? i would be surprised.. if you cant find one by googleing the request then just stick the thing in and off you go !!