You may want to consider doing an MA in economics at some Canadian school (the more highly ranked the better, of course). Although some Canadian universities have started admitting people directly from undergrad (to compete with the US), it seems that getting a master's degree before embarking on the PhD is still the norm. Take away UWO (which has quite a non-standard admissions process from what I've understood - I've no idea what they look for), I would say your chances at a PhD admit aren't that great without substantial advanced economics coursework. This is quite different from the US.
Doing an MA could also be advantageous with respect to course preparation (if your economics background is weak), obtaining
LORs, and convincing your preferred school that you're *passionate* about economics. PhD granting institutions in Canada aren't all that many and profs are likely to know profs, if you get what I mean.
Funding opportunities are not bad, and quite a few people get full funding. In fact, I can't think of any other country where master's students (in economics) are funded as generously.