This is probably the wrong place to post this but I'm hoping
maybe I can get a lead.
I want to add UPS, DHL, FedEx, and USPS shipping rates for
the US and Canada to a shopping cart. I'm currently using a custom
tag that queries UPS but I ran into issues with Canadian zone
support. Ideally, I'd like to add the shipping tables to a database
on my server and update them using a flat file as needed. Is there
any "add on" shipping solution that will do something like this and
provide the update data when rates change?