I’m frustrated

dead end jack

I have a dead end jack plugged on the left cymbal of my alesis Dm8, but I don't have one on the right cymbal which matters cause i don't have sound coming from the high level of the cymbal. where can I get this kind of jack???

I went to music shop and they 've never seen this kind of jack before.
I really need this jack to play my drums at its fullest.
Thanks for reading
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