Anyone with a bench grinder or machine shop?

I need to make a slight modification to 4 aluminum spacers that have a 1/4" lip on each side. I need the lip on one side of each spacer to go away.

Can anyone help with this?

I've got an angle grinder that would work. I was a weldor/fabricator before so you might say that "I'm kind of a big deal".
Time frame?
Steve

well i bought my new brakes back in november i think... had the spacers lying around since then... So i guess you could say I'm not in a big rush, but track season is approaching and I'd like to have them done before Eagles Canyon on April 11th if possible.