I assume that you mean the part that the license plate bolts to. But if you mean either the hugger or the "tray" for the battery, ECM, tool kit, etc., both referred to by Suzuki as rear fender, somebody probably would like them.
I removed that part from my K6 and installed a fender eliminator in it's place only to observe cracking of the fender cover around the mounting holes. I've since cut away all of the rear fender except where it bolts in place. The fender eliminator now attaches over it. This provides more support to the fender cover and hopefully will stop the cracking.
The same may apply to the L6 600, in which case the fender has a use.