Rory, I've only seen these on dpn's; sorry. But, I myself had the same problem (lack of money for dpn's), so I just made my own out of dowel rods from the hardware store. The dowels I got were like 50¢, and you get 4-5 out of them depending on how long you wanted them. Maybe that's a viable option for you? Amy's also got a video for making your own knitting needles. I cut my dowels the size I wanted them, then stuck each end in a pencil sharpener, then filed them down. If I worked a bit more on them, they'd probably work better, but for practically free, I'm not going to complain!