help finding drawer part

Plastic middle slide on drawer bottom missing that attaches to wooden strip below. It is about 1 1/2 " across flat part touching drawer, 1-1/4 between 7/18" "walls with four or five little "holders" to slide on wood, with one slightly highly part that protrudes out the back of drawer to start the drawer to shut. Strip is attached to front and back bottom of recessed drawer bottom. This is an old, five-drawer beautiful chest of drawers with carved outer two-thirds of each 3-part drawer. One of the slides is weak so I could use a couple of these. Sorry if this isn't clear. I'm a dumb blond. Katy