A friend of mine works in a machine shop, and had a good deal of extra stock of Delrin after a job he did......and he remembered that I said that some equipment in diving was made out of it.....so he asked me if he could make anything out of the extra stock.. I took him a spool, and within a few hours he had made over 50 of 'em with the extra stock he had.. He gave me 5 of 'em for letting him use the spool as a template, kept 10 for himself, and sold the rest to a local shop and made a killing.. They sold them all within a week, at a bit over half the price of the Halcyon spool.
If you know somebody with access to a machine shop, and knows how to program the mills.......buy a piece of Delrin and have him make you a bunch of 'em..
Mike