I like ICOM for FRS/GMRS even though I consider those radios to be along the line of toy walkie talkies....

Earbuds and Mics for FRS/GMRS is a broad order since most of the makers tend to be proprietary. I know where to get mics that fit most of the radios. but it depends on what you have to be sure! www.kawamall.com should show you a plethora of Gizmos for most popular FRS/GMRS type radios. I am not saying it is "GOOD" stuff but it works!