We've got an IKEA Narvik chest of drawers. The drawers slide on flimsy plastic runners which clip into the side walls. Or more correctly, the drawers slid on flimsy platic runners...
Unfortunately this product was discontinued by IKEA and they don't have any spares for it any more.
What's the best way of replacing the drawer runners, ideally with something a bit more durable than the originals which didn't last all that long?