That rear end plug, I have one in a kind of mint green compressed foam with a bucktail treble on it, no lip.
I've got a bunch of those rear end plugs. I've seen them in blue/white and solid green. I also have a solid white one with no hooks. I found it that way. It also has a piece of mono tied to it. Not sure it that was meant for anything, but always wondered about it.
Eric