Accuracy Plus in Peterborough could definitely do that for you. Maybe Williams' Arms in Port Perry, but I'm not sure if they provide that service.
Really, it is very simple to DIY, especially with the DNZ mount. The gun is drilled and tapped. Clean and degrease the screw holes and mounting screws, and slap it together, ideally using Loc-Tite on the mounting screws. A torque wrench is helpful, but not necessary. The recoil of that gun will be next to nonexistent, so if the screws are snug you are good to go. Remove the top halves of the rings, put the scope in, replace the tops and start the screws but don't tighten them. You don't need to worry about alignment of the rings on a one-piece unit like that. Holding the gun in shooting position, position the scope so that you can easily see the entire field of view, and make sure the crosshairs appear level. Ideally, you want the scope as far forward as possible while maintaining the sight picture, but again, with no recoil you won't have to worry about the scope biting you if its too far back. Tighten the screws alternately, a bit at a time, trying to maintain an even gap between top and bottom ring halves at all four corners. Snug is good...don't overtighten, and don't try to close the gaps...they are supposed to be there.
Boresighting? Remove the bolt, set the gun up on something solid (a vice is nice, but not mandatory) and look through the barrel to align with some object at roughly 50 yards or so. Look through the scope, making sure the gun doesn't move, and check where the crosshairs are centered. They'll probably be close, but not perfect. Again, not moving the gun, adjust the vertical and horizontal crosshairs to move the crosshairs onto the object that you still have centered in the barrel. You are adjusting the scope crosshairs to intersect with whatever the barrel is pointed at.
This should put you within a few inches when you fire your first shot. Refine the adjustments if needed, then move out to 100 yards (or whatever distance you are going to use) and sight in.
The one-piece mount makes this very easy to do, definitely easier to do than to explain. Enjoy, and welcome to the sport that will drive you to the poorhouse!
