I bought a CZ52 recently, you can't hardly beat the price, you get a lot of pistol for the money. I've always said it looks like the type of pistol a bad guy would use in a James Bond movie.
I too would like to have a new finish and grips on mine. New sights would be okay too. Though I'm interested, I'm not much help to you, I'm just too busy with work-related stuff right now.
Of course the gun could be re-blued or parkerized I suppose. I don't know if someone makes "after-market" grips or sights, I haven't been able to do any searching.