They do exist for male parrots. Please see this thread on Parrot Social
http://flockstock.co.uk/forum/viewtopic.php?f=7&t=60However, I would suggest looking at the other articles surrounding this. It seems to be that it's not a guaranteed thing that it will work and changes in diet, routine and behaviour should be discussed with your avian vet before you decide to do something that drastic. At least according to what the articles say.
If it was me I would go to an avian vet or perhaps an animal/avian behaviourist to explore ways of 'naturally' controlling hormones and linked behaviour before intervening medically. I'm sure there are plenty of people on this forum that would be able to help you with tips
