Incidentally I think white tops look great but that's just an aside.
And for goodness sake of course you should talk to the manager!!! The tops aren't gonna march down to the store and do the work themselves!
You phrased it "do you think a few of us should still try to talk to the manager", I'd suggest no more than two at most. You wouldn't want it look like a mob going in there to cause a scene which wouldn't enamour him/her to being helpful.