We've had success with ordering from Vessey's, although they send too many paper catalogues in the mail. They're glossy so we don't even use it for compost. You would think a seed company would consider that in their advertisements!
We've also used OSC seeds but I wasn't as impressed with them.
We haven't ordered trees yet, but I'll be looking at http://www.hardyfruittrees.ca/
based on their descriptions and the variety they have. I enjoy hearing about their experimentation and attempts to develop more hardy trees for us up north!
Whereabouts in NB? We're just outside of Fredericton. We just moved in at the end of October last year so this is our first spring on the property. it's exciting to see there are a few permies local to us!