Kong single stop bobbin

[GroundquestMSA]

I've an old Kong single stop descender if anyone is interested. It is well used and the glow in the dark handle appears to have been gnawed on by an alligator. I have used it a few times and just don't care for it. If you have any minor caving or surveying items or literature you can live without, I'll gladly do a trade. I'm willing to throw in a check for anything of higher value (such as an old taco).
Off the top of my head, a few things I could use include; footloops, survey book covers, rope pad, region specific literature (Pa, Oh, In, Va, Ky, WVa, Tn), geology literature, directions to secluded caves with breathtaking decoration and multiple unexplored blowing leads, etc. Really, almost anything. Thanks.