Broke an oem slider off my Drz the other day so I decided to make some when I saw an old skateboard that had been left in my underground for months.
Pretty straight forward ,went to home hardware and got some 5/8 ready rod and a bunch of washers,nuts and nylock nuts.
Put rod through axel,put skate wheels on,cut off excess rod.

New wheels would have looked better but hey free is free.
Total cost $5