There's a Canadian online store that offers 5000 iu D3 softgels .. http://www.yeswellness.com/natural-...oconut-oil.html.
They're located in Surrey, BC and they offer free shipping within Canada for orders over $49.

I have no affiliation with this company; in fact I only just discovered them by doing a web search for "vitamin D3 5000 in Canada" about 15 minutes ago


edit to add: There are more Canadian online stores offering D3 5000 ... for example ... http://www.lowcarbcanada.ca/product...iu-240-softgels in Toronto area.