My business is located in Canada and the only pre-programmed shipping option available within Deconetwork is UPS. I was wondering if there is any plugin for calculating shipping cost with Canada Post. Any way to implement one? (I know they had one for Wordpress)
New integrations like this would need to be implemented by the DecoNetwork team. There is an existing development task for this DNC-6273. At this stage, though, it's not scheduled for development due to the low demand at this time.
Could you look at setting up the price tables as a custom shipping method?