Drawer has one plastic bracket in the back. The closer metal has a patent no. US.6.932.200. Bottom of metal has number 7523-16/499/457 RH 07-06
Dave Sr. from SWISCO responded:
May 31, 2019
The original replacement sockets for your part has been discontinued. The options we have to offer now are our 32-025 and 32-094 hanging bracket. These can be used in either the left or right hand side. Take a look at each part to see if either of these will work for you.