Can anyone tell me if there is a replacement headphone set a guy could wire in on a cz 21 that is waterproof an yet would have more room in the cups?? My problem is I use the machine on dirt an beach an in dirt I ware hearing aids which the muffs set into a wild whistle, in the water areas I scoop everything an dont need the aids. On dirt I use a pinpointer an cant hear it without the aids. I still want to b able to use it in water if need b. Thanks. Grumpy