Search for "red plastic rod" in the ebay search box. You might have to add something like "turcite" to the search. There will probably be many choices to come up. Look for the seller listing a number of different types for sale, and contact him, letting him know the diameter, color, and what you want to make from it. The exact item may not be currently listed, but I've done just this, and was sold some oil-filled Nylon, and Delrin, at different times, in sizes that worked for what I needed without having to buy way more than I would ever need for some small job.
If you were closer, I'd loan you my Maasdam rope puller, and some tree work ropes, and rigging stuff. I also move what needs to be moved by myself when necessary. The rope puller works like a come-a-long, but you're not limited to a short cable. You can run any length of twisted 1/2" rope through it, and there are very strong, low stretch tree work ropes that it can use.