Searching for Drawer guide fisher price model 9551

I need to replace 4 drawer guides for a Fisher Price dresser/changing table model number 9551 from 1988. I also need small round grommets that hold a swing arm to stop the drawer from falling out. I'm not even clear on how these work because only one stays in the upright position..the silver bar generally falls with the hole to the bottom.
Ant help you can provide will be appreciated.
Thank you.