Search Ebay for "Chevy truck parking brake". There's a used drum, internal/external shoes, and some linkage for sale today for $75.00. No handle or ratchet, however. It's on about page 6 or 7 of the listings.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!