Easiest solution:
http://www.talleymanufacturing.com/
Don't take my word for it, pull up Kenny Jarrett's web page and see why this is the only mounting system he will use on his custom rifles. Made in SC - that's South Carolina, not south China!
I plan on sending my slide here for NS install and am considering refinishing the slide in Stainless or Cerakot.
http://www.xd-hs2000.com/xd-hs2000/Sight_Instalation.html