Just wanted to give an update. I contacted Snap On again and this tine they gave me a part number and told me they would be sending me the rails free under warranty even though the box is at least 30 years old. Weird. But great news. Hopefully they fit. Ill let you know. Part number they gave me...
Anyone know the part numbers for the ball bearing slides for the right bottom drawer on a KR560? Not finding anything online or their website. Thanks in advance.