Hey, brufz6, congratulations! I hope you love your conversion as much as I'm loving mine!
You can go a few different routes with mirrors. You can add ones to the handlebars using a clamp that is threaded so the mirrors will attach to them. You can also go the bar end mirror route (like I did).
I chose CRG Hindsight LS mirrors that can be folded in when the bike is stored or when you're in a tight spot. CRG also makes the Hindsight mirror and the only difference between those and the LS model is the folding hinge. With these, you'll need to either buy the CRG bar ends that are the requisite 7/8" diameter so the mirrors can clamp to them, aftermarket bar ends that have a channel for the mirror to clamp to (the route I took), have your stock bar ends milled down to 7/8" (the "channel" needs to be at least 3/8" wide for the clamp), or move your controls inward so you can clamp the mirrors directly to the bars.
Another option is Rizoma mirrors. They also clamp to the bar ends, but they can clamp to a much bigger bar end (it doesn't have to be 7/8" diameter). BUT, you'll need bar ends that are straight and not tapered like the stock FZ6 bar ends.
To give you an idea:
My CRG Hindsight LS mirrors clamped to the aftermarket RhinoMoto bar ends specifically made for them:
And a version of the Rizoma mirrors I was referring to:
Now, top of the line mirrors AREN'T cheap. My CRG's were about $146 shipped from a vendor on eBay and the RhinoMoto bar ends were another $60. But I wanted to do it right (in my own eyes), so I went for the best. Others have tried a "knockoff" version of the CRG mirrors that you'll see on eBay and say they're great and they are much cheaper, so that might be an idea.