I posted this some time last year:
Belmont, Brothers, Canning Eastern Districts, Midland and Armadale basically make up Central Districts which turned into Kalamunda Bulldogs.
Armadale merged with Eastern Districts to make up Central Districts at the start of 2007. The agreement was for the side to play in the Bulldogs jerseys at home games and in the Rabbitohs jerseys at away games. That didn't eventuate. That's in the constitution of Central Districts.
As for old teams, I could only think of:
Applecross Jets [Blue and Gold]
Armadale Rabbitohs/Warriors [Red and Green]
Belmont Steelers [Black and Sliver]
Brothers [Black and Green]
Canning Bulldogs [Blue and White]
Kalamunda Bulldogs [Blue and White and Red and Green]*
Eastern Bulldogsz [Blue and White]
Fremantle Roosters [Red, White and Blue]*
Joondalup Giants [Maroon, Yellow and White]*
Goldfields Titans [Blue, Yellow and White]*
Mandurah Monarchs [Blue, White and Yellow]
Marrangaroo Bulls [Blue and Red]
Midland Gators [Blue, Yellow and White]
Mosman Park Cottesloe Tigers [Black and Orange]
North Beach Sea Eagles [Maroon and White]*
Rockingham Raiders/Sharks [Green, White, Blue and Yellow, Blue and Black]*
Sorrento Dolphins [Green and White]
South Perth Lions [Red and White]*
South West Warriors [Grey and Black]*
Willagee Bears [Black and Red]*
*Current WARL clubs