Good question, but I can't say as I remember ever seeing any good pics of it being done.
Some I hear are pretty creative, but it would be nice to see pics too.
My typical recommendation is simply a strip of plastic or aluminum or steel (cut to whatever size is appropriate for the particular body lift installed) with holes for the stock points on the radiator, and another set spaced down 1, 2, or 3 inches, or whatever it takes to mount the shroud at the proper level.
Repeat at the bottom of the radiator and you should be good to go.
Hopefully someone will have good pics though, as my description leaves a lot to be desired in the "clear as mud" department.
Paul