Normally this function is built into the drawer slides themselves. I don't recall this as an option that Vidmar offers new (but it's been a few years since I looked in detail at configuring cabinets). Maybe you could buy different slides with appropriate length and weight capacity and adapt them to the drawer and frame mounting? That's often kind of difficult because of the limited available space...
Failing that, maybe glue a deep-ish strip of weak-ish open cell foam to the inside back of the frame or the outside back of the drawer, so it has to be compressed between drawer and frame when closing?
