Telus has told us that they are "..unable to make these ports available for port forwarding purposes, since they are required exclusively elsewhere.."
I'm not sure they know what they are talking about (depends often on who you get to talk to). However, before I spend more time with these folks right now, I'm wondering if the community here have any experience with this. If I can use some other ports with our application(s), that would avoid a lot of unnecessary communication. If only 80 & 443 are necessary, then I'll possibly have to switch ISPs, which would be unfortunate, since they've been very good with other support over the years.