Hey man, whatever you get, you can put a Tremol-No on it (if it's got a Floyd type trem), and lock your action in where it's at, and drop tune. The deep C feature allows you to still use your trem for dive bombs. I have one and LOVE it.
http://www.tremol-no.com/default.asp
I don't know where you can buy one now, AllParts don't sell them anymore. Maybe you can contact the company and ask them.
Edit: I found the URL for the page on AllPart's website, I just visited the forum on the Tremol_no website. Here it is:
http://www.allparts.com/store/bridge...10,Product.asp