Try http://www.ziplinehomekits.com.
Seems we paid around $250 for the zip line, including the handle, cable and connectors. But, we hired a man to build the frame and platform as well as the pole at the other end. If I remember, we had him measure and build those things in his shop from some of his existing materials. We added the boards onto the platform from some of the cedar we had milled back then. We designed the poles and platform and he fabricated it from oilfield materials...2 7/8" drill stem, heavy 1/4" angle iron and steel loops to connect the cable. Each pole has links from a chain welded to it to connect not only the cable, but anchor cables on the backside of each pole. The anchor cables are attached with cable clamps to the pole and each pole has two mobile home anchors screwed into the ground, where we attached two cables to keep the poles from swaying with the weight of the zip line victims, er, riders. Each pole is buried 42" in the ground, in concrete. We've had to tighted the anchor cables at least twice a year. We'll probably trade cables next year.
Mike, you are sure welcome to come take a look...just let us know. You have my cell number.


Teach a man to grow fish...
He can teach to catch fish...