Personally, I think your scope choice is wrong- wrong because 50mm passes plenty of light, and there is no call for huge magnifications on a handgun- I know you are an experienced shooter and recognize this, so what gives with the monster scope? Are you trying to make some kind of benchrest pistol out of it?
All you should need is a riser block to go between the standard scope rail and receiver- sure I can make one for you, but there are cheaper options.
Consider a ProMag riser rail for $20: http://www.google.com/products/catalog?hl=en&complete=0&q=scope+riser+rail&bav=on.2,or.r_gc.r_pw.&biw=1044&bih=826&wrapid=tlif131498129631410&um=1&ie=UTF-8&tbm=shop&cid=14839781667665523982&sa=X&ei=vAVhTt-uI6Tv0gGNisXxDw&ved=0CDwQ8wIwAQ#
All you should need is a riser block to go between the standard scope rail and receiver- sure I can make one for you, but there are cheaper options.
Consider a ProMag riser rail for $20: http://www.google.com/products/catalog?hl=en&complete=0&q=scope+riser+rail&bav=on.2,or.r_gc.r_pw.&biw=1044&bih=826&wrapid=tlif131498129631410&um=1&ie=UTF-8&tbm=shop&cid=14839781667665523982&sa=X&ei=vAVhTt-uI6Tv0gGNisXxDw&ved=0CDwQ8wIwAQ#