The one at Upper James and Fennell is probably your best bet. Take any of the buses from Mac to Gore Park (1A, 5A, 51, 10, etc.) then take any of the ones that go through Upper James to get there. I don't know the 35 very well, but I know the 27 and the 20 (A-line) take you to that corner too.
Alternatively, there's the
Ancaster Wal-Mart or the
Stoney Creek location.