3d printers tend to not be super accurate in the dimensioning dept. so its possible that the hole could be come out a tad oversized, or a thousandth or two undersized. Same with the keyway.
I'd be more than happy to print it for you, but my 3d printer is out in an unheated shop and doesn't work very well in low temps. I'm still probably a month away from shop temps up here that'll allow me to get decent results running the flashforge.
I bet there's a Kinkos or similar near you that could do it. Or perhaps another member would be able to hook you up.
Heres the .stl file, attached to this post.
I'm hoping its not too big to attach. If so, ill upload it to thingiverse.