NEVER over tighten your control arms!...
Especially the front uppers,... they are quite flimsy, and you may end up bending them!...
I replaced the upper control arms, on my friend's Integra with some that are similar to the ones you showed us!... Right out of the box, you could see that there was a gap between the anchor bolt bushing and the control arm itself,... I didn't like this for the same reason that you expressed concern!...
So, I ran down to the hardware store, picked up a few stainless steel washers, and used them to take up the aforementioned slack (gap)!... I was curious to see how long my solution to this little dilemma would hold!... I figured, "What the hell!", worst case scenario, I would have to take them back off and use some hardened steel shims!... But, being that those bolts are only supposed to be torqued to 40ft.lbs,... I didn't see the need to have to spend the extra money for the "specialty" pieces (hardened steel shims)!...
It's been over a year now and my friend has never even brought up anything having to do with those control arms!... So, I figure that my "quick fix" worked, since he's had me do lots more work on his car since then!... You would think that if he thought of me as doing crappy work,... he wouldn't bother bringing his car to me anymore, right?...
If you try this, let me know how it works for you,... unless, you've already found some other viable solution!...
And, if that's the case,... let us know what it was!...
I'm always eager to see how other people solve their problems!...