Huronia Beekeepers Members
4 frame deep nucs (per the OBBA standard) with overwintered Ontario queens. Ontario Resistant Honey Bee Selection Program (ORHBS) member
$220 including transport box
Contact: 705-716-5402 Email: email@example.com
Innisfil Creek Honey
4 frame deep nucs or 5 frame medium nucs – $225
Contact: 705-456-5093 Email: firstname.lastname@example.org
They also have a general list of members of the Ontario Bee Breeders Association here
Their Nuc Buyers Guide is also good guideline as to what questions to ask what you should be expecting when purchasing a nuc.
OMAFRA also offers this page with information on Queen, Nucleus and Colony Producers which includes a listing of registered producers.