I mostly do small, independent races. I have a latex allergy that is pretty severe, so I email race directors and explain that I will have a reaction even if I wear a silicone cap under my latex race cap. They always let me wear my own cap (I have several colors so I wear the correct color for my swim wave). Is there a way to do that for an IM race or to have a race supplied silicone cap? Who would I contact?