Finding a threaded barrel may be a little challenging. You might try BarSto
http://www.barsto.com/category_main.cfm?ID=XD&cco=63or Jarvis
http://www.jarvis-custom.com/Product...8/Default.aspxfor starters.
For a suppressor, I would recommend a couple:
Since you are in AZ, you should consider SRT Arms GS Matrix. The GS has a booster that will assure function on any pistol. See:
http://www.srtarms.com/9mmcan.htm
Another good selection would be the AAC Evolution or the SWR GS9-K3.
http://www.advanced-armament.com/pro.../evolution.asp
http://www.swrmfg.com/ProductDetails.asp?ID=5