Need help with a spacer/bushing

[psuedopimp]

I know a lot of guys don't have to replace half their beds, and even less use a truck bed to complete the process. I am in the process of cutting down a long bed to fit my blazer bed. When removing the seat support bracket from the underneath of the bed I noticed two spacers/gaskets that maybe used for squeak control. Not sure what else they would be for. Any ideas on what I should use? Obviously the originals are toast.