Do you need to make so many or were u just making spares? 
I detailed the shock mount in my build thread (look in my sig) Basically its 2 washers, one bolt, a length or pvc pie, and then heavy gauge weed whacker line wrapped tightly around the pipe.you end up with something the looks heavy and metal, but is a fraction of the original weight. (Normall, you have a stack of steel washers, weighing a pound or two at least.
thanks
Brilliant build!
hey dude how much do your bumpers run i really need one i have been going crazy building one but have had no luck.