Actually, the Sunday Sunday I remember around that "time frame" (which was the name of the show that preceded it) was nationally syndicated out of CFTR beginning in the fall of 1980. 

The host back then was none other than news director Robert Holiday and featured weekly contributions from 'TR newsroom regulars including John Wilson, Tricia Wood, Bev Bowman, Melanie Reffes and of course, the main producer, the late Clint Nickerson. Other 680 types also were expected to play an occasional role and names like Corey Galbraith, Roger Ward and Dana Lewis did a few bits, and yes, so did Arlene Bynon and Ben Steinfeld, although they weren't hosts. 

And if memory serves, even soon-to-be-Rogers high muckety-muck John Hinnen did the occasional sports story or two. If I'm not mistaken, some subscriber stations' newsrooms occasionally sent in pieces, as well. 

It was quite an undertaking in the days of reel-to-reel distribution (no satellite use back then.) It lasted until early 1982, when it was cancelled because, while it was well received, it was simply too expensive to produce.

Thanks Unc!