I'm working out the final details for the system in my 1986 Toyota Tercel wagon. The sub, amps, rear components, and deck have all been finalized. I'll be using a pair of 4" mids in the stock locations in the dash. What I'm looking for now is a pair of small tweeters to mount in the outboard a/c vents. I have a spare pair of Polk MM400s, but I really don't want to grind the housing off them to make them smaller. What's out there with either a removable housing or no housing at all?

BTW, I'm old enough now that I'm not looking to make my ears bleed. I'd just like to find something smooth and not too bright.