replacing back-screw standoffs

[sundog]

does anyone have a 3d model and/or the exact dimensions of the back-screw standoffs?

I've managed to break both of mine and I'd like to print some replacements if possible.

If you still have them, you can put some double sided tape that's used for cell phones one them and they'll stay put.

I broke mine off and they've held firm with an inch of the tape under each and I've removed the bottom a bunch of times.

My problem is that they have each physically broken into multiple pieces. I don't think I've managed to find all the pieces in order to try this.