Avirunes and Yahoo both are great and they are almost free for now I think so.
I can also try to manage signature campai🤣😃
Avirunes, Edward and Yahoo are great guys really but i am not sure if they are willing to manage a signature campaign for altcoins unless you choose to pay through bitcoin but try to contact them first because they are more reputable than myself; you can contact me if they say NO, i will help you because i have some spare time.