I take it you don't read that many comic books?
Besides the issue of
DC Special Series #10 in 1978
(and if you haven't seen that story before, try http://blackcanaryfan.blogspot.com/2...nary-1978.html), as well as those two issues of
Justice League of America back in 1983 that first introduced the "mother/daughter" concept for Black Canary, the
post-CoIE origin(s) for both Black Canaries was retold/clarified back in 1990's
Secret Origins #50.
During the
New52, we got a glimpse into the revised backstory of Black Canary in
Birds of Prey #25 (January 2014):
And then in 2015,
Secret Origins #11 had her origin.
There may also be versions I'm not familiar with.
So, until they pin down whether there was still a separate Golden Age Black Canary with the
(currently unaccounted for) JSA, and if/how that Black Canary may-or-may-not be connected to the one we have been reading about since
DC Universe: Rebirth, I don't think we need/want any more origins for Black Canary yet.