Where to find durum wheat berries in Canada

Hi there,  I am planning on buying a grain mill.  I am now trying to find wheat to grind, in particular durum wheat.  I can only find one source for this in canada (Fieldstone Organics), but the price with shipping is very high at $40 for a 5kg bag.  Does anyone know where else I can find it either to order, or locally near hamilton Ontario?  

Thank you!