Patrick, I was worried about the same thing happening to my battery tray. I found a similar slide to the original Accuride one but a little heavier. A pair of these are rated for 300 pounds load when used in a vibrating application like a motorhome. They have a 20 inch slide length which brings the tray out just like the original. There is some of "If a little bit is good, more is better" in me so I used two pair stacked vertically. The slides are available from McMaster-Carr Part Number 1102A66. McMaster-Carr is an industrial supply company but you can order off the web at McMaster-Carr
using a credit card.
You will have to drill some new bolt holes. I made new brackets since I used two pair. Hope this helps,