For my threaded stem mtb conversions, I use these for 1" quill stems with a 35 degree long stem.

http://www.jensonusa.com/!!oQb3lEPZiS2aA1ZXl11Ng!/Dimension-Quill-Stem-Adaptor?utm_source=FRGL&utm_medium=organic&pt_source=googleads&pt_medium=cpc&pt_campaign=shopping_us &pt_keyword=&gclid=CP_jvJfcy88CFQ6OaQodyHYFKQ

For 1-1/8" quills, no good quill stem adapter exists with a rise over 1". I use these instead.

http://www.bikewagon.com/part/stems/quill-stems/sunlite-stem-quill-alloy-2bolt-180x25-4x80bk