I need help. Does anybody know how to find silicone urethral sounds that are 10.5, 11, 12, 12.5 mm in diameter and about 12 to 13 inches in length???

@SW-User stainless steel doesnt work for me. It doesnt go all the way to the prostate and bladder like the silicone sound does. Thats the whole point. Ive been looking all over and i cant find the sounds with the sizes that i want. Google sucks.