Personally, I think that that will always happen with 5's and S's unfortunately. I know what you mean. I actually "made" that number so it would match with the "Camaro-font"
. If we change the shape, it'll look goofy; out of place, and if we want it to match the block lettering, then it'll have to stay like that.
Tell you what, If you stay online for 15 minutes or so. I'll run it through photoshop and see what I can do, okay? (I'll try and hexagon-looking the bottom of the 5.)