Electronic versions are a good option.
However, CHS charts (and that means all Canadian charts) sell exclusively via CHS retailers - not direct. So when you arrive at the retailer you need to check out/compare whether a (particular) paper version or the electronic (package version) suits your objectives.
Oh - and by the way - CHS electronic versions are encrypted. So if you don't have
de-encryption software on your plotter or your laptop these electronic versions are quite useless.
Charles