The Unofficial Mandylor Bro.s Page
Site has information about both brothers, including filmography, biography, and photos.

Costas Mandylor FanSite
Fan site with filmography, tribute, pictures, and links.

My Costas Mandylor Page
Fan site with pictures, filmography, brief biography, and related information.

TV Now: Costas Mandylor
The actor's current month's television schedule.

IMDb.com - Costas Mandylor
Complete filmography and biography of the actor.