Help identifying cabinet drawer plastic part

This appears to be a cheap way of mounting a specific plastic drawer in the shelf pin holes. One of these broke (not this one) and I'm trying to find where to purchase a replacement. An hour of googling resulted in nothing. This is for a rental house, so we would prefer to just replace this rather than rebuild the drawers and buy all new slides. The other option would be to create a permanently mounted pin, which I think I'll end up doing. But, if any of you know what this might be that would be much appreciated. Attachment 50559 (http://www.doityourself.com/forum/attachments/carpentry-cabinetry-interior-woodworking/50559-help-identifying-cabinet-drawer-plastic-part-image.jpg)