As a visitor then are you able to apply for a work permit once you get AOR?
If you are eligible for a work permit, you can apply any time. You are not eligible for a BOWP anymore since your work permit expired, the AOR does not change this.
Or will I just have to wait to become an actualy PR before I can start working again? Thanks.
That may be the case, unless you are eligible for a TWP (e.g. have LMIA) or through some other means. But you are no longer eligible for the BOWP, unfortunately.