webster for real short $ you can make a new lanyard set up. if your set on coming up with something instead of using the buckstrap, you could use some components from that, and you probably have the rest of what you would need kicking around.
9ft+ of rope (whatever you preference, i use probably 12'), some hitch cord, a boatsnap/micopulley/ anything to tend the hitch, a snap, and a carabiner.
the termination knot at the end is free. if you have a sherrill catalogue you can find an example to build one off of.
think you will love the change, good luck