Cool. Yeah, that's the Kvar part you need. Don't forget a few other things:
- Pins from Kvar to mount the FSB (you may be able to re-use your old ones depending on whether you're as ham-fisted as I am or not). I salvaged three from my Saiga and completely demolished and dremeled a stubborn one. I wasn't being particularly careful, because I knew I wasn't going to reuse the old gas block, and I had extra pins (like $2 at kvar).
- Plunger pin, spring, and retainer (kvar)
As far as putting it together, just about any AK smith can. If you have a particularly handy local smith, he may be willing to do it. If you have to send it out, I'd go with AKUSA, simply because all things being equal, they do a boatload of 104's.
take care,
Tec