One thing that I've seen used for separating cards are wire-wrap pins.
For what you are doing, it sounds like they would work quite well ...
assuming you can solder them in place. If not, what about plastic or
aluminum standoffs available at most any electronics supply place?
Does anyone in this group have four 9/16" risers
that they'd like to sell
or trade me? I actually found two in my supplies, but I need four of the
same height. If anyone would like a picture to get a better idea of what I
need, let me know via private email.
Bill Degnan