$200+ for a tool to use one time (?). Would most gunsmiths have one? or be able to move my P200 rear site?

Most gunsmiths get fed up and build a universal sight press after destroying a few of those little $200 toys. Those small presses are meant for shooters who will only use them a few times. I have bought several over the years and quickly destroyed them. The grown up versions are much more precise and controllable, VERY EXPENSIVE to make, but make up for their cost by lasting a lifetime.

statans press3 by Rod Henrickson, on Flickr

I only use Sig pistols, own several, and change the sights every six years or so. I have the Sig factory tool. I have used the toy over thirty times, and it works absolutely great in my admittedly special situation.

Find a gunsmith with a real tool. If you have no luck, you can send me your slide, and new sights. I will change them out and send everything back in the same shipping box. You just pay the shipping. Then go spend some money with a gunsmith for something.