Kinney's Shooting Supply south of the border has DIP 25 MOA rails for Anschutz 17xx rifles. They ship to Canada quickly at very reasonable rates.
How far do you plan on pushing the Annie 54 out? Is a 25-30 moa scope rail necessary?
I shoot my Annie 64 for precision
+1 on DIP rail. Nice standard to go by.
Minor point of note. The DIP rails have a cutout that enables easy hand-loading but by same design also limits the mounting slots for rings. Depending on design, you may or may not be able to use an one-piece unimount at all and essentially only go with rings. This isn't a big deal but if you have an optic you were hoping to swap back/forth on platforms in an unimount, it would be unlikely.